# How to improve Wi-Fi signal strength and speed, step by step > Measure first, then move the router, pick the right band and channel, update firmware, and add a wired access point or mesh node where one router cannot reach. - URL: https://computese.com/how-to-improve-wi-fi-signal-strength/ - Author: Duong Quan Nguyen, CEO, Computese - Published: 2024-09-17 - Updated: 2026-09-25 - Topics: IT support ## In short - Measure before changing anything: signal and a speed test next to the router, where you work and in the worst spot, plus one test over Ethernet. The pattern tells you whether the plan, the coverage, the channel or the device is the limit. - Do the free fixes first: a central, high, open spot for the router, away from metal, concrete and water; 5 or 6 GHz near the router and 2.4 GHz for reach; channel 1, 6 or 11 at 20 MHz on 2.4 GHz; current firmware. - 6 GHz needs a Wi-Fi 6E or Wi-Fi 7 router and device, and depends on the country: the US (2020) and Canada (2021) opened 5925 to 7125 MHz, while the EU and the UK allow only the lower part, up to 6425 MHz. - Where one router cannot reach, a wired access point (Ethernet, MoCA or powerline backhaul) beats a mesh node, and a mesh node beats an extender that repeats everything over the same air. - Replace the router when it no longer gets firmware updates, cannot carry your plan's speed over a cable, or lacks the bands your devices use. To improve Wi-Fi signal strength, measure first, then fix the cheapest cause: move the router to a central, high, open spot away from metal and masonry, use 5 or 6 GHz near the router and 2.4 GHz for reach, pick an uncrowded channel, update the firmware, and add a wired access point or mesh node where one router cannot reach. This guide takes those steps in that order, for a home or a small office: how to measure on Windows and macOS, how to tell whether the internet plan is the real limit, placement, the three bands (and where 6 GHz is allowed), channels, firmware, extenders versus mesh versus wired access points, the device side, and when a new router is the answer. It is about coverage and speed. Locking the network down (WPA3, a guest network, WPS off) is a separate job, covered in [how to set up a secure home Wi-Fi network](https://computese.com/how-to-set-up-secure-home-wi-fi-network/), and [how eavesdropping attacks work](https://computese.com/understanding-eavesdropping-attacks-how-they-work/) explains why it matters. ## Measure your Wi-Fi before you change anything Slow or patchy Wi-Fi has four usual causes: the internet plan, coverage (distance, walls, placement), interference or crowding from other networks, and the device itself. Each fix below helps with only one of them, so start with numbers. Microsoft's [Wi-Fi and your home layout](https://support.microsoft.com/en-us/windows/experience/connectivity-networking/wi-fi-and-your-home-layout) guide recommends the same routine: record speed tests in several places before you change anything, then repeat them after each change. 1. **Pick three spots:** a short distance from the router (the strongest reading is usually a few feet away, not right beside it), the place you normally work, and the worst spot you care about. 2. **At each spot, note the signal strength and run a speed test,** with the same device and the same test each time. 3. **Plug a laptop into the router with an Ethernet cable and test again.** That result is the ceiling the Wi-Fi is working under. 4. **Change one thing at a time,** then repeat the tests. Two changes at once tell you nothing about either. ### On Windows Open Terminal or Command Prompt and run: ```powershell netsh wlan show interfaces netsh wlan show networks mode=bssid netsh wlan show wlanreport ``` The first command reports your current connection, including its receive and transmit rates and a signal percentage. Windows' [WLAN API](https://learn.microsoft.com/en-us/windows/win32/api/wlanapi/ns-wlanapi-wlan_association_attributes) defines 100% as -50 dBm and 0% as -100 dBm, linear in between, so 60% is about -70 dBm. The second lists every access point in range with its signal strength, channel and radio type, which Microsoft's [troubleshooting guide](https://learn.microsoft.com/en-us/troubleshoot/windows-client/networking/wireless-network-connectivity-issues-troubleshooting) uses to find band, channel and coverage problems. The third writes an HTML [wireless network report](https://support.microsoft.com/en-us/windows/experience/connectivity-networking/analyze-the-wireless-network-report) of the last three days of Wi-Fi sessions, with the reason for each disconnect. In Windows 11, your network's properties under **Settings > Network & internet > Wi-Fi** also show the [network band and channel](https://support.microsoft.com/en-us/windows/experience/connectivity-networking/faster-and-more-secure-wi-fi-in-windows). ### On a Mac Hold **Option**, click the Wi-Fi icon in the menu bar and choose **Open Wireless Diagnostics**. Per Apple's [Wireless Diagnostics guide](https://support.apple.com/guide/mac-help/use-wireless-diagnostics-mchlf4de377f/mac), it analyzes the connection, lists the issues it found with possible solutions, changes no settings, and saves a report in `/var/tmp` for whoever supports your network. If the Wi-Fi menu shows a **Wi-Fi Recommendations** item, [macOS has already detected a problem](https://support.apple.com/en-us/101588) and suggests a fix. ### What the numbers mean Signal strength (RSSI) is measured in dBm, a negative number where closer to zero is stronger. A practical threshold is the point at which devices themselves give up on an access point: [Apple's iPhone and iPad](https://support.apple.com/guide/deployment/wi-fi-roaming-support-dep98f116c0f/web) start looking for a better one when the signal falls to -70 dBm, and a Mac at -75 dBm. If the place where you work reads weaker than about -70 dBm, it needs better coverage, not a different channel. The receive and transmit rates are link rates, not speeds. Apple defines the [physical layer (PHY) data rate](https://support.apple.com/guide/deployment/wi-fi-ethernet-specifications-apple-devices-dep268652e6c/web) as the highest rate at which a client can transmit over Wi-Fi; a speed test measures what actually arrives. Read the results together: | What you measured | What it points to | Where to start | | ----------------------------------------------- | ------------------------------------------------ | ----------------------------------------- | | The wired test is slow too | The internet plan, modem or provider | Check the plan (next section) | | Fast near the router, weak and slow far away | Coverage: distance, walls, placement | Move the router, then add an access point | | Strong signal, but slow or dropping connections | Interference or a crowded channel | Change the band, channel or width | | One device is slow where others are fast | The device: its adapter, driver, or power saving | Fix the device side | ## Check whether your internet plan is the real limit Wi-Fi cannot deliver more than the connection behind it. The wired test from step 3 is how you find out: Microsoft's own [Wi-Fi troubleshooting steps](https://support.microsoft.com/en-us/windows/experience/connectivity-networking/fix-wi-fi-connection-issues-in-windows) use a PC plugged in by Ethernet to tell a router problem from a provider problem. Compare the wired result with the plan. In the US, providers must show a [broadband label](https://www.fcc.gov/broadbandlabels) for each plan that discloses its speeds; elsewhere, check the plan details from your provider. - **Wired result close to the plan, Wi-Fi far below it:** the Wi-Fi is the bottleneck, and the rest of this guide applies. - **Wired result well below the plan:** restart the modem, then the router, and test again. If it stays low, call the provider; no Wi-Fi change will fix it. - **Both fine, but the plan is too small for the household:** the fix is a faster plan, not a new router. Also check what else is using the connection while you test. Cloud backups, game downloads and several video streams can fill a modest plan, and Microsoft suggests looking in Task Manager for processes using a lot of network bandwidth. ## Put the router in the right place Placement is the first free fix. Microsoft's [setup guide](https://support.microsoft.com/en-us/windows/experience/connectivity-networking/setting-up-a-wireless-network-in-windows) says to put the router as close to the centre of the home as possible, off the floor and away from walls and metal objects such as filing cabinets; its home layout guide adds that a corner or the space under a desk reduces signal strength, and that higher is better. Every wall between the router and your device costs signal, and some materials cost far more than others. Apple rates them this way in its [guide to wireless interference](https://support.apple.com/en-us/102319): | Between the router and the device | Interference potential | | ------------------------------------- | ---------------------- | | Wood, glass, many synthetic materials | Low | | Water, brick, marble | Medium | | Plaster, concrete, bulletproof glass | High | | Metal | Very high | Apple's own example is a metal-reinforced concrete floor between the router and the device. In practice, keep the router out of metal cabinets, away from fish tanks and off the floor of a concrete basement. Keep it clear of other radios too: Microsoft notes that microwave ovens and many cordless phones use the same 2.4 GHz frequency and can interrupt the signal while they run, and Apple adds power cables, fluorescent lights, wireless video cameras and poorly shielded USB 3 devices. ![Top view of a small home. A router in the central hallway sends even Wi-Fi arcs to a laptop and a phone in far rooms, while a second router in a corner cabinet beside a fish tank reaches almost nothing.](https://computese.com/images/blog/how-to-improve-wi-fi-signal-strength/placement.9628df4d3c-1536.webp) *Signal spent passing through walls, metal and water never reaches your devices: a router in the middle of the home, in the open, wastes the least of it.* If the modem sits in a corner because that is where the line enters the building, run an Ethernet cable from the modem to a router placed in the middle of the home rather than living with the corner. ## Choose the right band: 2.4, 5 or 6 GHz Consumer Wi-Fi uses three bands, and each trades range for speed. Microsoft's [home layout guide](https://support.microsoft.com/en-us/windows/experience/connectivity-networking/wi-fi-and-your-home-layout) sums up the differences: | Band | Strengths | Weaknesses | Best for | | ------- | --------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------ | ---------------------------------------------- | | 2.4 GHz | Longest range, passes walls best, supported by the most devices | Slowest; only three channels that do not overlap; shared with Bluetooth, microwave ovens and cordless phones | Distant rooms, smart-home devices | | 5 GHz | Faster, more non-overlapping channels, less congested | Shorter range, weaker through walls | Laptops and phones within a room or two | | 6 GHz | Fastest, least congested, lower latency | Shortest range; needs Wi-Fi 6E or Wi-Fi 7 on both the router and the device | Devices close to the router or an access point | The gap is large even on one device. Apple's specifications for its Wi-Fi 7 iPhones (iPhone 16 and later, except the e models) list a maximum PHY rate of 2,400 Mbps on 5 or 6 GHz with 160 MHz channels, against 229 Mbps on 2.4 GHz with 20 MHz channels. A laptop that has drifted onto 2.4 GHz can be the whole problem. What Wi-Fi 7 adds on top, and when it is worth buying, is covered in [Wi-Fi 7 explained](https://computese.com/wi-fi-7-standard-set-to-achieve-certification-in-early-2024-bringing-advanced-connectivity/). Vendors disagree on network names. Microsoft suggests a separate name per band so you can see which one you are on. Apple's [recommended router settings](https://support.apple.com/en-us/102766) ask for one name across all bands and routers, because devices may otherwise not connect reliably to every band, and Apple devices flag a [Wi-Fi 6E network](https://support.apple.com/en-us/102285) with different names per band as having limited compatibility. Use one name day to day, and a temporary separate name only to test one band. ### Where 6 GHz Wi-Fi is allowed 6 GHz needs a Wi-Fi 6E or Wi-Fi 7 router and a device that supports it; Apple's list starts with the iPhone 15 Pro, Mac models from 2023 and the MacBook Air from 2024. It also depends on where you are, because each country's regulator decides how much of the band Wi-Fi may use: | Region | 6 GHz range open to Wi-Fi | Decision | | -------------- | ------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | United States | 5925–7125 MHz (1,200 MHz) | [FCC, April 23, 2020](https://docs.fcc.gov/public/attachments/DOC-363945A1.pdf) | | Canada | 5925–7125 MHz | [ISED, May 2021 (SMSE-006-21)](https://ised-isde.canada.ca/site/spectrum-management-telecommunications/en/spectrum-allocation/radio-local-area-network-rlan-6-ghz-band/decision-technical-and-policy-framework-licence-exempt-use-6-ghz-band) | | European Union | 5945–6425 MHz | [Implementing Decision (EU) 2021/1067](https://eur-lex.europa.eu/eli/dec_impl/2021/1067/oj/eng), June 17, 2021; member states by December 1, 2021 | | United Kingdom | 5925–6425 MHz | Lower band only, per the [Wi-Fi Alliance's regulations map](https://www.wi-fi.org/regulations-enabling-6-ghz-wi-fi) as of September 2026 | The US allows low-power indoor access points across the full 1,200 MHz; standard-power access points get 850 MHz of it, under an automated frequency coordination (AFC) system, and Canada's decision sets out similar classes. Apple notes that its 6 GHz features are not available in every region, and that Wi-Fi 6E is not available in mainland China. ## Pick a clear channel and the right channel width Most routers use a channel set at the factory, and in an apartment building or a dense street that channel is often shared with many neighbours. See what is around you with `netsh wlan show networks mode=bssid` or a Wi-Fi analyzer app, then follow Microsoft's rules: - **On 2.4 GHz, use channel 1, 6 or 11.** These are the only channels that do not overlap. Pick the one with the fewest networks on it and on the channels next to it. - **On 5 GHz, overlap matters less,** so pick the channel with the fewest access points. - **Start with Auto.** Apple recommends the Auto setting, and most routers scan for the least crowded channel when they start or reset. Microsoft notes that some Auto implementations choose badly, so check what the router picked and set a channel by hand if it sits on a crowded one. - **Give each access point its own channel** when you have more than one, especially if they are close together. ![Three rounded signal humps stand side by side without touching, each above a small router. A fourth orange hump sits between the first two and overlaps both, with jagged marks where they collide.](https://computese.com/images/blog/how-to-improve-wi-fi-signal-strength/channels.fce06ec8a7-1536.webp) *On 2.4 GHz only channels 1, 6 and 11 stay clear of each other; a network parked between them collides with both neighbours.* ### Channel width Channel width is how much of the band one connection uses at once. Apple recommends 20 MHz on 2.4 GHz and Auto (all widths) on 5 and 6 GHz, because wider channels are faster but more susceptible to interference. Microsoft adds that 40 MHz on 2.4 GHz trips up some older adapters: if the signal is strong and the channel is clear but the connection is still unreliable, set the 2.4 GHz width to 20 MHz. ### DFS channels on 5 GHz Part of the 5 GHz band is shared with radar. In the US, [FCC rule 15.407](https://www.govinfo.gov/content/pkg/CFR-2025-title47-vol1/pdf/CFR-2025-title47-vol1-sec15-407.pdf) requires Dynamic Frequency Selection (DFS) on 5.25 to 5.35 GHz and 5.47 to 5.725 GHz: a router must listen for radar for 60 seconds before using such a channel, stop transmitting within 10 seconds when it detects radar, and stay off that channel for at least 30 minutes. So a radar detection moves the whole network, and some devices rank DFS channels lower: Apple devices prefer [non-DFS 5 GHz networks](https://support.apple.com/en-us/102169) when choosing what to join. If the Wi-Fi drops for no visible reason while the router is on a DFS channel, set a non-DFS 5 GHz channel and see whether the drops stop. ## Update the firmware, then check a few settings Router firmware updates fix bugs as well as security holes. Apple's router guidance recommends turning on automatic firmware updates where the router offers them, because they deliver improvements to stability, performance and security. Before you change any setting, back up the router's configuration, as Apple also advises, so you can undo a mistake. While you are in the router's settings, check three things that affect speed, all from the same Apple guidance: 1. **Radio mode: all modes enabled.** Every device can then connect with the fastest Wi-Fi version it supports. 2. **WMM (Wi-Fi Multimedia): on.** It prioritizes voice and video traffic, should be on by default on any Wi-Fi 4 or later router, and turning it off can hurt performance. 3. **No legacy security modes.** WEP, WPA and anything with TKIP are insecure and also reduce reliability and performance. The rest of the security settings belong to [a network hardening checklist](https://computese.com/how-to-secure-your-home-network/), not to this guide. Then restart the modem and the router, and repeat your tests. ## Add coverage: extender, mesh or wired access point When the measurements still show a weak signal in rooms you use, even with the router well placed, you need another radio closer to those rooms. There are three ways to add one, and the difference is the backhaul: how the extra radio gets traffic back to the router. | Option | Backhaul to the router | Trade-off | | ------------------------- | -------------------------------------------------------------- | -------------------------------------------------------------------------------------- | | Wi-Fi extender (repeater) | Over Wi-Fi | Cheapest and simplest; everything it relays crosses the air twice, so it costs airtime | | Mesh system | Over Wi-Fi between nodes, or a cable if the system supports it | One network, nodes coordinate and steer devices; wireless hops still share airtime | | Wired access point | Ethernet, MoCA over coax, or G.hn over power or phone wiring | Best speed and stability; needs a cable path to each access point | **Extenders** are, as Microsoft describes them, small devices that plug into an electrical outlet. Put one where the router's signal is still good, usually about halfway to the dead zone, not in the dead zone itself: an extender can only pass on the signal it receives. **Mesh systems** make several access points behave as one network. [Wi-Fi CERTIFIED EasyMesh](https://www.wi-fi.org/alternative-topologies), the Wi-Fi Alliance's standard for it, has the access points guide devices to the best one and adapt to changing conditions, and lets you mix access points from different vendors. Place the nodes so their coverage overlaps; a node at the edge of the router's range starts with a weak link. **Wired access points** give the best result, because a cable carries the backhaul without using any airtime. Ethernet is the first choice. Where new cable is impractical, existing wiring can do the job: [MoCA](https://mocalliance.org/moca-for-wi-fi-backhaul/) turns the home's TV coax into a network, rated at 2.5 Gbps with under 2.5 ms of latency for MoCA 2.5, and [G.hn](https://homegridforum.org/g-hn-in-the-premises/), a family of ITU-T standards, runs over coax, phone wires or power wiring. Powerline results depend on the building's electrical wiring, so test one pair before buying more. If your mesh system supports wired backhaul, a cable between nodes turns a mesh node into a wired access point. ![A router in one room connects by a long orange Ethernet cable to a ceiling access point in a far room, which serves a laptop below it; a plug-in extender in the middle room relays over the air instead.](https://computese.com/images/blog/how-to-improve-wi-fi-signal-strength/backhaul.7475e72a40-1536.webp) *A cable carries the backhaul without touching the air, so the far access point spends its airtime on your devices instead of on repeating the router.* Whichever option you choose, give every access point the same network name and settings, as Apple recommends. Devices then roam between them, but late: an iPhone holds on to its current access point until the signal falls to about -70 dBm, and a Mac until -75 dBm. If the router offers 802.11k, 802.11v and 802.11r, turn them on: Apple devices use 802.11k's list of neighbouring access points to find a roam target without scanning every channel, and 802.11r to reconnect faster. In an office, plan for access points on Ethernet, each on its own channel, rather than one router in a server cupboard. Our [IT support service](https://computese.com/services/it-support/) takes on projects such as a new office or a device refresh, and patches operating systems, apps and firmware on a schedule. ## Fix the device side: adapters, drivers and power saving When one device is slow where others are fast, the problem is usually that device: - **Check what the adapter supports.** On Windows, `netsh wlan show drivers` lists **Radio types supported**: `802.11ax` means Wi-Fi 6 or 6E, and `802.11be` means Wi-Fi 7, which [Windows 11 supports from version 24H2](https://support.microsoft.com/en-us/windows/experience/connectivity-networking/faster-and-more-secure-wi-fi-in-windows). An older adapter may support only 2.4 GHz and never see a 5 GHz network. On Apple devices, check Apple's lists for Wi-Fi 6E and Wi-Fi 7 support. - **Update the driver.** Run Windows Update, then compare the driver version and date in Device Manager with the latest on the PC maker's site, as Microsoft's [Wi-Fi troubleshooting steps](https://support.microsoft.com/en-us/windows/experience/connectivity-networking/fix-wi-fi-connection-issues-in-windows) describe. The same routine for phones and other operating systems is in [how to update your computer or phone](https://computese.com/how-to-update-your-computer-or-phone/). - **Turn off Wi-Fi power saving on a laptop that drops out.** In **Control Panel > Hardware and Sound > Power Options**, change the plan's advanced settings and set **Wireless Adapter Settings > Power Saving Mode** to **Maximum Performance**; in Device Manager, clear **Allow the computer to turn off this device to save power** on the Wi-Fi adapter. It costs some battery life. - **On Apple devices, leave Location Services on for networking.** Apple's router guidance explains that each country's regulations define the Wi-Fi channels and signal strength allowed, and Location Services for **Networking and wireless** helps the device use them correctly. - **Move USB 3 devices and hubs away from the laptop,** and use shielded cables: Apple lists them as a source of interference for nearby wireless devices. Also expect less from phones than from routers. Apple's Wi-Fi 7 iPhones, per its specifications, top out at 160 MHz channels and two spatial streams, so a router's 320 MHz channels do nothing for them. ## Wi-Fi standards at a glance A connection uses the best features that both the router and the device support. The [Wi-Fi Alliance](https://www.wi-fi.org/wi-fi-macphy) names each generation; Apple's specifications give the matching IEEE standards: | Generation | IEEE standard | Bands | What it adds for speed and coverage | | ---------- | ------------- | -------------------------------------- | ------------------------------------------------------------------------------- | | Wi-Fi 4 | 802.11n | 2.4 and 5 GHz | Combined channels, up to 40 MHz | | Wi-Fi 5 | 802.11ac | 5 GHz (products are usually dual-band) | 80 MHz channels, multi-gigabit data rates | | Wi-Fi 6 | 802.11ax | 2.4 and 5 GHz | OFDMA and multi-user MIMO for busy networks, 160 MHz channels, Target Wake Time | | Wi-Fi 6E | 802.11ax | Adds 6 GHz | Wi-Fi 6 in the 6 GHz band | | Wi-Fi 7 | 802.11be | 2.4, 5 and 6 GHz | 320 MHz channels in 6 GHz, Multi-Link Operation, 4K QAM | Wi-Fi 7 was introduced in 2024. Its Multi-Link Operation lets a device use two bands at once, and Windows shows it in the network's properties when **Network band (channel)** lists more than one band. What else it changes, and which devices benefit, is a subject of its own. ## When to replace your router Replace the router when one of these is true, not because a new model promises more range: 1. **It no longer gets firmware updates.** In a [May 7, 2025 warning](https://www.ic3.gov/PSA/2025/PSA250507), the FBI noted that end-of-life routers receive no software updates or security patches, that routers dated 2010 or earlier likely no longer get updates, and advised replacing end-of-life devices. 2. **It cannot carry your plan.** If a laptop wired to the router tests well below the plan, but the same laptop wired straight to the modem does not, the router is the limit. 3. **It lacks the bands your devices use:** no 5 GHz, no Wi-Fi 6, or no 6 GHz when your devices support Wi-Fi 6E or 7 and your country allows it. 4. **The home is too big for one radio.** Then buy a mesh system or wired access points, not a bigger single router. If you add your own router behind the provider's gateway, only one of them should hand out addresses (DHCP) and translate them (NAT). Apple warns that NAT on both, called double NAT, can cut devices off from some resources. For a business, the question of when to replace network equipment is part of keeping an asset register: our [IT support service](https://computese.com/services/it-support/) keeps one and advises on what to replace and when. ## Key terms - **dBm and RSSI**: Received signal strength indicator, in decibels relative to one milliwatt. Wi-Fi readings are negative and closer to zero is stronger: Windows treats -50 dBm as 100%, and a Mac starts looking for another access point at -75 dBm. - **Band**: One of the frequency ranges Wi-Fi uses: 2.4 GHz (longest range, most crowded), 5 GHz (faster, shorter range) and 6 GHz (fastest, shortest range, Wi-Fi 6E and Wi-Fi 7 only). - **Channel and channel width**: A channel is the slice of a band a network transmits on; the width (20, 40, 80, 160 or 320 MHz) is how big that slice is. Wider channels carry more data but pick up more interference. - **DFS (Dynamic Frequency Selection)**: The radar-avoidance rule for parts of the 5 GHz band. A router must listen for radar before using a DFS channel and leave it when radar appears. - **Access point**: The radio that devices connect to. A home router contains one; extra access points, mesh nodes and extenders add more radios in other rooms. - **Backhaul**: The link that carries traffic from an extra access point back to the main router: over Wi-Fi, or over a cable such as Ethernet, coax (MoCA) or power wiring. - **Mesh Wi-Fi**: Several access points that act as one network with one name, and steer devices to the best one. Wi-Fi CERTIFIED EasyMesh is the Wi-Fi Alliance's multi-vendor version. - **MoCA**: Multimedia over Coax, a standard that turns a home's existing TV coax into a wired network. MoCA 2.5 is rated at 2.5 Gbps and is used as Wi-Fi backhaul. - **Link rate (PHY rate)**: The highest rate a device's radio can use on its current connection. It is shown as the receive and transmit rate, and is always a ceiling, not the speed a test measures. - **Roaming**: A device moving its connection from one access point to a stronger one on the same network. Standards 802.11k, 802.11v and 802.11r help it happen faster. ## Common questions ### How can I boost my Wi-Fi signal without buying anything? Move the router to a central, raised spot in the open, away from metal, concrete and water; connect nearby devices to 5 GHz; set the 2.4 GHz band to channel 1, 6 or 11 at 20 MHz; update the router's firmware; and restart the modem and router. On Windows laptops, also set the wireless adapter's power saving to Maximum Performance. ### Is a mesh system better than a Wi-Fi extender? Usually, yes. An extender repeats the router over the air, so everything it relays uses airtime twice. A mesh system's nodes act as one network and steer devices to the best node. Either works better with a cable back to the router, which turns it into a wired access point. ### What is the best Wi-Fi channel? On 2.4 GHz, use channel 1, 6 or 11, because only those three do not overlap; pick the one with the fewest networks around you. On 5 GHz, overlap matters less, so pick the channel with the fewest access points. Start with the router's Auto setting and change it only if it chose a crowded channel. ### Should I use 2.4 GHz or 5 GHz? Use 5 GHz, or 6 GHz if both ends support it, for devices within a room or two of the router, and 2.4 GHz for distant rooms and smart-home devices. 2.4 GHz reaches further and passes walls better but is slower and shared with Bluetooth, microwave ovens and cordless phones. ### What is a good Wi-Fi signal strength in dBm? Closer to zero is better. Windows reports -50 dBm as 100% signal, and Apple's iPhone and iPad start looking for a better access point at -70 dBm, a Mac at -75 dBm. If the spot where you work reads weaker than about -70 dBm, improve coverage there. ### Why is my Wi-Fi slow when the signal is full? A strong signal rules out distance, not the rest. Check a wired speed test against your plan, look for a crowded channel or a 2.4 GHz connection, and check what else is using the connection. If one device is slow while others are fast, update its driver and turn off its power saving. ## Sources 1. [Wi-Fi and your home layout](https://support.microsoft.com/en-us/windows/experience/connectivity-networking/wi-fi-and-your-home-layout), Microsoft Support 2. [Wireless network connectivity issues troubleshooting](https://learn.microsoft.com/en-us/troubleshoot/windows-client/networking/wireless-network-connectivity-issues-troubleshooting), Microsoft Learn 3. [WLAN_ASSOCIATION_ATTRIBUTES structure (wlanapi.h)](https://learn.microsoft.com/en-us/windows/win32/api/wlanapi/ns-wlanapi-wlan_association_attributes), Microsoft Learn 4. [Analyze the wireless network report](https://support.microsoft.com/en-us/windows/experience/connectivity-networking/analyze-the-wireless-network-report), Microsoft Support 5. [Faster and more secure Wi-Fi in Windows](https://support.microsoft.com/en-us/windows/experience/connectivity-networking/faster-and-more-secure-wi-fi-in-windows), Microsoft Support 6. [Use Wireless Diagnostics on your Mac](https://support.apple.com/guide/mac-help/use-wireless-diagnostics-mchlf4de377f/mac), Apple Support 7. [If your Mac isn't connecting to the internet over Wi-Fi](https://support.apple.com/en-us/101588), Apple Support 8. [Wi-Fi roaming support in Apple devices](https://support.apple.com/guide/deployment/wi-fi-roaming-support-dep98f116c0f/web), Apple Platform Deployment 9. [Wi-Fi and Ethernet specifications for Apple devices](https://support.apple.com/guide/deployment/wi-fi-ethernet-specifications-apple-devices-dep268652e6c/web), Apple Platform Deployment 10. [Fix Wi-Fi connection issues in Windows](https://support.microsoft.com/en-us/windows/experience/connectivity-networking/fix-wi-fi-connection-issues-in-windows), Microsoft Support 11. [Broadband Consumer Labels](https://www.fcc.gov/broadbandlabels), Federal Communications Commission 12. [Setting up a wireless network in Windows](https://support.microsoft.com/en-us/windows/experience/connectivity-networking/setting-up-a-wireless-network-in-windows), Microsoft Support 13. [Resolve Wi-Fi and Bluetooth issues caused by wireless interference](https://support.apple.com/en-us/102319), Apple Support 14. [Recommended settings for Wi-Fi routers and access points](https://support.apple.com/en-us/102766), Apple Support 15. [Use Wi-Fi 6E or Wi-Fi 7 networks with Apple devices](https://support.apple.com/en-us/102285), Apple Support 16. [FCC adopts new rules for the 6 GHz band, unleashing 1,200 megahertz of spectrum for unlicensed use](https://docs.fcc.gov/public/attachments/DOC-363945A1.pdf), Federal Communications Commission 17. [Decision on the Technical and Policy Framework for Licence-Exempt Use in the 6 GHz Band (SMSE-006-21)](https://ised-isde.canada.ca/site/spectrum-management-telecommunications/en/spectrum-allocation/radio-local-area-network-rlan-6-ghz-band/decision-technical-and-policy-framework-licence-exempt-use-6-ghz-band), Innovation, Science and Economic Development Canada 18. [Commission Implementing Decision (EU) 2021/1067 on the harmonised use of the 5945-6425 MHz band for WAS/RLANs](https://eur-lex.europa.eu/eli/dec_impl/2021/1067/oj/eng), EUR-Lex 19. [Regulations Enabling 6 GHz Wi-Fi](https://www.wi-fi.org/regulations-enabling-6-ghz-wi-fi), Wi-Fi Alliance 20. [47 CFR 15.407: General technical requirements (U-NII devices), 2025 edition](https://www.govinfo.gov/content/pkg/CFR-2025-title47-vol1/pdf/CFR-2025-title47-vol1-sec15-407.pdf), U.S. Government Publishing Office 21. [How Apple devices decide which known wireless networks to auto-join](https://support.apple.com/en-us/102169), Apple Support 22. [Alternative Topologies: Wi-Fi EasyMesh](https://www.wi-fi.org/alternative-topologies), Wi-Fi Alliance 23. [MoCA for Wi-Fi Backhaul](https://mocalliance.org/moca-for-wi-fi-backhaul/), Multimedia over Coax Alliance 24. [G.hn in Home Networking](https://homegridforum.org/g-hn-in-the-premises/), HomeGrid Forum 25. [Wi-Fi (MAC/PHY): Wi-Fi 4 to Wi-Fi 7](https://www.wi-fi.org/wi-fi-macphy), Wi-Fi Alliance 26. [Cyber Criminal Proxy Services Exploiting End of Life Routers (I-050725-PSA)](https://www.ic3.gov/PSA/2025/PSA250507), FBI Internet Crime Complaint Center