Simple answers to common Wi-Fi questions
Type your problem in your own words below. Every answer says what to check, what to leave alone, and when it's time to call someone for help.
124 answers found · last checked 17 August 2026
My Wi‑Fi is not working—what do I do?
First establish whether all devices are offline or only one device/room. Check router/ONT power and lights, then test one device close to the main router.
TriageIs the broadband down or is it just my Wi‑Fi?
A wired test at the main router separates the incoming service from the wireless layer. If wired works but Wi‑Fi does not, focus on coverage, interference or the client.
TriageOnly one phone or laptop won’t connect—why?
If other devices work, the broadband and router are probably live; forget and rejoin the network, verify password, update/restart the device and check it is not paused or blocked.
TriageSome websites work but others do not.
This can be DNS, VPN, filtering, IPv6 or the destination—not necessarily weak Wi‑Fi. Compare another device/browser, disable VPN temporarily and test a known site.
TriageThe Wi‑Fi says connected but there is no internet.
The device has joined the local wireless network but the router may lack a working internet session, DNS may be failing, or access may be paused.
SpeedWhy am I not getting the full package speed over Wi‑Fi?
The package speed is delivered to the router; a wireless device’s result also depends on its radio, band, signal, interference, mesh hop and current traffic. Test the gateway or a capable wired device first.
SpeedWhy do different speed-test websites give different answers?
They may use different servers, routes, test durations, browser limits and load. Use the ISP/router test for line-to-router speed and a reputable nearby server for device speed.
SpeedHow should I run a fair Wi‑Fi speed test?
Pause large downloads, turn off VPN, use one modern device near the main router, confirm the band, and repeat three times. Also run a gateway or Ethernet test.
SpeedWhy is my gigabit Ethernet test stuck around 90 Mbps?
A 100 Mbps Ethernet negotiation commonly produces results near 90–95 Mbps. Check for a damaged/two-pair cable, 100 Mbps port, adapter/dock limit or forced speed setting.
SpeedWhy is upload slow but download is fine?
Upload can be consumed by cloud backup, cameras, video calls or malware; Wi‑Fi interference can also affect both directions differently. Test wired with background uploads paused.
SpeedWhy is Wi‑Fi slower in the evening?
More household traffic and neighbouring channel use can raise contention; an ISP network issue is also possible. Compare gateway and client tests at matched times.
SpeedWhy did my old laptop get slower after I upgraded broadband?
The broadband upgrade does not upgrade the laptop’s Wi‑Fi radio. An older 802.11n/one-stream client, driver or 2.4 GHz connection may be the limit.
SpeedDoes having lots of devices slow the Wi‑Fi down?
Idle devices use little internet capacity, but active or chatty devices share airtime and bandwidth. Cameras, backups and streams matter more than the raw device count.
SpeedWhy is the router app speed good but my phone speed bad?
The router test measures internet delivery to the gateway; the phone test includes the Wi‑Fi path, phone capability and location.
SpeedWhy is latency high even when the speed looks fast?
Throughput and delay are different. Congestion, bufferbloat, weak signal, retries, VPN routing or game-server distance can raise ping without reducing a headline speed result.
CoverageWhy is Wi‑Fi weak upstairs or in the garden?
Distance plus walls, floors, foil insulation, metal and glazing reduce signal. A centrally placed node or properly positioned mesh unit is usually better than extra broadband speed.
CoverageWhere should I put my router?
Put it upright, out in the open, elevated and as central as the fibre/cabling allows—away from cupboards, TVs, radiators, metal, fish tanks and large electronics.
CoverageCan I keep the router in a cupboard?
It may work, but cupboards absorb and trap the signal, especially if metal or full of electronics. Moving the Wi‑Fi access point into the open usually improves coverage.
CoverageWill a faster package fix a dead spot?
Usually not. Package speed improves capacity to the router; a dead spot is a radio coverage problem needing better placement, mesh or Ethernet.
CoverageWhere should I put a mesh booster?
Place it where it still receives a good signal from the upstream node—often midway toward the weak area, not in the dead zone. Keep it open and away from interference.
CoverageCan I add too many mesh units?
Yes. Excess nodes can increase co-channel airtime, poor roaming and unstable backhaul. Add only where measurements show a need.
CoverageWhy does my phone stay connected to the farther mesh unit?
The client ultimately decides when to roam. Steering can encourage a better node/band but cannot force every device immediately. Toggle Wi‑Fi or move briefly to trigger a rescan.
CoverageCan I use an old extender with my new mesh?
It may create a separate network, double NAT or poor roaming and can reduce performance. Prefer platform-compatible managed nodes or Ethernet access points designed for the network.
CoverageWill Ethernet backhaul improve mesh performance?
Often yes: it removes the wireless backhaul hop and can improve consistency, especially through dense walls or between floors.
CoverageWhy is Wi‑Fi poor in a new-build home?
Foil-backed insulation, underfloor heating, dense plasterboard and metal can attenuate radio signals. Multiple well-placed wired nodes may be needed.
Bands & legacyWhat is the difference between 2.4 GHz and 5 GHz?
2.4 GHz reaches farther and supports more legacy/IoT devices but is usually busier and slower; 5 GHz offers higher capacity at shorter range.
Bands & legacyWhy can’t I see separate 2.4 and 5 GHz network names?
Modern mesh systems commonly use one SSID and steer clients between bands. The bands still exist even though only one name is shown.
Bands & legacyHow do I connect a 2.4 GHz-only smart device?
Keep the phone on the home Wi‑Fi, enable location/Bluetooth permissions, put the device in pairing mode and temporarily use the platform’s 2.4 GHz onboarding method.
Bands & legacyShould I permanently split the Wi‑Fi bands?
Usually no; one SSID enables steering and roaming. Split only for a demonstrated legacy-device need and document the consequences.
Bands & legacyMy old device can see neighbours’ Wi‑Fi but not mine.
It may not support 5/6 GHz, WPA3, the current channel or SSID settings. Confirm 2.4 GHz is enabled, use WPA2-compatible mode temporarily and update the device.
Bands & legacyWhy won’t a WPA2-only device join my Wi‑Fi 6/6E router?
Wi‑Fi generation and encryption are separate. Some legacy clients fail with WPA3/hybrid modes even when 2.4 GHz exists. A temporary WPA2 compatibility test can confirm this.
Bands & legacyIs 6 GHz the same as 5G mobile?
No. 6 GHz is a short-range Wi‑Fi band used by compatible Wi‑Fi 6E/7 devices; 5G is a cellular technology.
Bands & legacyWhy does 5 GHz disappear farther from the router?
Higher-frequency 5 GHz signals generally attenuate more through distance and obstacles, so the device may fall back to 2.4 GHz or lose the band.
Bands & legacyShould I disable 802.11b or old Wi‑Fi modes?
Legacy rates can consume airtime, but disabling them can disconnect old printers/IoT. Change only after inventorying clients and testing.
Bands & legacyWhy won’t my device connect to a hidden SSID?
Some IoT devices and setup apps handle hidden networks poorly. Temporarily broadcasting the SSID may help; hiding an SSID is not meaningful security.
Sky TVMy Sky Q box keeps disconnecting from Wi‑Fi.
Check whether the main Q box, Mini boxes or all devices are affected. Restart the affected box, verify it joined the intended network, and test Ethernet to isolate Sky’s wireless link.
Sky TVWhy do Sky Q Mini boxes freeze even though phones work?
Minis depend on a stable path to the main Sky Q box as well as internet. Multicast/mesh topology, interference or a weak inter-box link can affect TV while phones appear fine.
Sky TVShould Sky Q use Ethernet or Wi‑Fi?
Ethernet is often more stable for fixed TV equipment if correctly installed. If Ethernet is used, review Sky wireless/mesh settings to avoid duplicate paths.
Sky TVCan Sky Q boxes act as Wi‑Fi hotspots with another ISP?
Sky says hotspot capability depends on compatible equipment and setup; with a non-Sky router it may not operate the same way. Treat Sky Q distribution separately from the ISP mesh.
Sky TVMy Sky Stream puck buffers—whose fault is it?
Test another streaming service and the puck near the router or over Ethernet. A good gateway test plus poor puck Wi‑Fi indicates local connectivity; failures across services/devices may indicate broadband.
SonosMy Sonos speakers keep dropping out.
Check whether one speaker or grouped playback fails, update Sonos, verify all units are on the intended LAN, and assess 2.4 GHz congestion/multicast and mesh topology.
SonosWhy can’t the Sonos app find my speakers?
The phone and speakers must be able to discover each other on the local network. Guest isolation, VPN, different VLANs/SSIDs or permissions can block discovery.
SonosShould Sonos use 2.4 GHz, 5 GHz or SonosNet?
It depends on the Sonos models and topology. Follow current Sonos system requirements; modern units may use supported bands, while legacy products and SonosNet have different rules.
SonosWhich 2.4 GHz channel should I use for Sonos?
Sonos recommends 20 MHz width and, when manually selecting, channels 1, 6 or 11. On managed mesh, automatic channel selection may be preferable.
SonosWhy does grouped Sonos audio cut out but one speaker is fine?
Grouping multiplies synchronized traffic and exposes weak links, interference or topology problems. Identify the first failing room and test smaller groups.
SonosCan wiring one Sonos speaker make things worse?
Yes, in some mixed networks it can alter Sonos topology or expose spanning-tree/loop problems. Wiring can also help when designed correctly.
PrintersMy wireless printer cannot see the new Wi‑Fi.
Many older printers support only 2.4 GHz and WPA2. Confirm its exact model, enable compatible 2.4 GHz onboarding and reset only the printer’s network settings.
PrintersThe printer is online but my laptop says offline.
The printer may have changed IP address, the laptop may be on a guest network/VPN, or the print queue/driver may be stale.
PrintersWhy does the printer stop working after the router was replaced?
The SSID/password/security or subnet changed. Reconnect the printer to the new network and remove/re-add it on computers if discovery records are stale.
PrintersCan I connect a USB-only printer to the router?
Only if that exact router supports USB print-server functionality; many modern ISP/mesh routers do not. A small print server or always-on computer may be required.
PrintersWhy can phones print but Windows cannot?
That points to the Windows driver, print queue, firewall or discovery profile rather than broadband. Verify the PC and printer are on the same LAN and test the printer IP.
Cameras & IoTMy Ring doorbell has poor video even with fast broadband.
Doorbell quality depends on signal and upload at the door, not just package speed. Check Ring RSSI, obstruction, power and whether live view/upload traffic is stable.
Cameras & IoTShould my Ring doorbell use 2.4 or 5 GHz?
Use the bands supported by the exact Ring model. 2.4 GHz often reaches farther through walls; 5 GHz may be faster at short range.
Cameras & IoTMy cheap smart plug/bulb says Wi‑Fi password wrong.
Often the device supports only 2.4 GHz or WPA2, the setup phone lacks location/Bluetooth permission, or the SSID/password contains unsupported characters.
Cameras & IoTCan I trust a no-name camera from Temu, Shein or TikTok on my main network?
Treat unknown-brand IoT as higher risk: update firmware, change default credentials, review privacy terms and isolate it on a guest/IoT network where that still permits needed functions.
Cameras & IoTWhy does my smart device fail when my phone is on mobile data?
Some setup apps require the phone to be on the same local Wi‑Fi, with local-network/location/Bluetooth permissions. Turn off mobile-data switching temporarily during onboarding.
Cameras & IoTMy smart device works locally but not away from home.
Remote access depends on the vendor cloud, account, DNS/firewall and sometimes inbound connectivity. Check vendor service status before changing router settings.
Cameras & IoTWhy did all smart devices break after changing Wi‑Fi name?
IoT devices store the old SSID/password and usually need to be migrated or re-paired. Temporarily restoring the previous credentials may reconnect them if safe.
Cameras & IoTWhy is my camera offline at night only?
Night-time interference, scheduled access controls, power/lighting changes, upload congestion or marginal signal can be involved. Correlate exact times.
Cameras & IoTCan smart-home devices communicate across a guest network?
Guest networks commonly isolate clients from the main LAN and sometimes from each other, which can stop discovery/control. Use a designed IoT network if local communication is required.
Cameras & IoTWhy won’t Matter or HomeKit discover a device?
Discovery may require the same LAN plus multicast/mDNS, Bluetooth and correct phone permissions; guest isolation or VPN can interfere. Thread devices may also need a compatible border router.
VPN & workWhy is Wi‑Fi slow when I use my work VPN?
Encryption and the route through the employer’s VPN gateway add overhead and may be congested. Compare the same device with VPN on/off; a fast non‑VPN result points away from the ISP.
VPN & workVideo calls freeze but speed tests look fine.
Calls need low loss, jitter and latency, not just throughput. Test near the router or wired and check other uploads, VPN and Wi‑Fi retries.
VPN & workWhy does Teams work on Ethernet but not Wi‑Fi?
That isolates the issue to the wireless client/path: signal, interference, driver, roaming or band—not the internet service itself.
VPN & workCan you prioritise my work laptop?
Some platforms offer device priority/QoS, which may help during local congestion but cannot fix weak signal, packet loss or a congested remote VPN.
VPN & workMy company says my IP address changed—why?
Residential public IPs may be dynamic; VPNs show the VPN exit IP. A static IP or DDNS is needed only for specific authorised business uses.
VoIPMy internet phone has one-way audio.
One-way audio commonly points to NAT/firewall or blocked RTP media, not Wi‑Fi speed alone. Test the ATA/phone by Ethernet and review SIP/NAT design.
VoIPCalls sound robotic or break up.
Packet loss, jitter, latency and upstream congestion cause broken voice. Test wired, pause uploads and capture a failing call time.
VoIPMy ATA will not register after changing router.
Check DHCP/IP, DNS, cabling, SIP credentials and whether double NAT, CGNAT or firewall/ALG behaviour changed.
VoIPWill my digital phone work in a power cut?
Usually not unless the ONT/router/phone equipment has backup power. Ofcom requires providers to address emergency-call resilience, especially for at-risk customers.
VoIPCan I plug my old phone into an ATA?
Often, but compatibility depends on tone/ringing, connectors and the VoIP service. Alarms, fax, lifts and telecare need explicit compatibility testing.
VoIPWhy does fax not work reliably over VoIP?
Fax tones are sensitive to packet loss, jitter and codec conversion. T.38 support or an alternative digital document service may be required.
Gaming & NATWhy does my console say Strict NAT?
Strict NAT can result from double NAT, CGNAT, disabled UPnP or missing port mappings. First identify the WAN IP and number of routers.
Gaming & NATWhat is CGNAT and why does it affect me?
CGNAT lets multiple customers share one public IPv4 address. Normal browsing works, but inbound hosting, some games, VPNs and port forwarding may not.
Gaming & NATCan you open ports for my game or camera?
Only after confirming the exact device, protocol and necessity. Prefer UPnP for compatible games or vendor-cloud/VPN solutions; manual forwarding increases exposure.
Gaming & NATShould I enable UPnP?
UPnP improves automatic NAT traversal for consoles but lets trusted LAN devices request mappings. Keep devices secure and avoid it on untrusted networks.
Gaming & NATWhy is game ping bad only on Wi‑Fi?
Weak signal, interference, roaming and contention add delay/retries. Compare Ethernet; if wired is good, optimise Wi‑Fi or wire the console.
Gaming & NATCan IPv6 improve gaming or remove NAT problems?
IPv6 can provide end-to-end addressing where the ISP, router, game and firewall support it, but it does not automatically improve latency and still requires firewalling.
Advanced Wi‑FiWhat is band steering?
It encourages compatible clients toward a preferred band, usually 5/6 GHz, but the client makes the final association decision.
Advanced Wi‑FiWhat is client steering between mesh nodes?
The mesh can encourage roaming to a better access point, but clients choose when to move. Poor node placement can make steering ineffective.
Advanced Wi‑FiWhat is DFS and why did 5 GHz briefly disappear?
DFS channels share spectrum with radar. A router detecting radar must leave the channel, which can briefly interrupt or move compatible clients.
Advanced Wi‑FiCan I manually change channels on eero?
No; eero uses automatic channel selection. Radio Analytics can show busyness, but manual channel selection is not currently offered.
Advanced Wi‑FiWhat do RSSI, SNR and noise floor mean?
RSSI estimates received signal power; SNR compares signal with noise; noise floor reflects background energy. Stronger signal and adequate SNR generally reduce retries, but thresholds are device/use dependent.
Advanced Wi‑FiWhy is channel width important?
Wider channels can raise peak throughput but consume more spectrum and may be less stable in congested areas. 20 MHz is usually safer on busy 2.4 GHz.
Advanced Wi‑FiWhat is airtime or channel busyness?
Wi‑Fi is shared and half-duplex: devices take turns. High activity or interference leaves less airtime and can increase latency and reduce throughput.
Advanced Wi‑FiWhy do I get packet loss with a strong signal?
Strong RSSI does not guarantee a clean channel or healthy path. Interference, driver bugs, congestion, backhaul or WAN issues can still drop packets.
Advanced Wi‑FiWhat is double NAT?
Double NAT occurs when two routers both perform routing/NAT. It can affect gaming, inbound access, VPNs and discovery. Use one routing layer where possible.
Advanced Wi‑FiShould my eero be in bridge mode?
Only when another required router is doing routing. Bridge mode keeps eero Wi‑Fi but disables several advanced network/security features.
Advanced Wi‑FiWhat is WPA3 and can it break old devices?
WPA3 improves security, but some legacy clients struggle with WPA3 or mixed modes. Use current firmware and the least-weakened compatible setting.
Advanced Wi‑FiWhat is Wi‑Fi 6, 6E or 7 and will it make every device faster?
Newer standards improve efficiency and capability, but each client uses only what it supports; distance, channel, backhaul and internet tier still matter.
IP & DNSWhat is the difference between a public and private IP address?
Private addresses are used inside the home; the router’s public address represents the connection on the internet. Under CGNAT even the router WAN may be private/shared.
IP & DNSWhy did my IP address change?
Most residential services use dynamic addresses that can change after lease/session/network events. Use supported DDNS or a paid static IP for a genuine requirement.
IP & DNSWhat is DNS and why can it make the internet look down?
DNS translates names into IP addresses. If it fails, apps using cached/direct addresses may work while websites by name fail.
IP & DNSShould I change DNS to Google or Cloudflare?
Only as a controlled diagnostic or informed policy choice. It may bypass provider filtering, alter privacy/performance and not fix weak Wi‑Fi.
IP & DNSWhy do I have an IPv6 address as well as IPv4?
Dual stack lets devices reach services over either protocol. IPv6 uses a different address format and is normal when supported.
IP & DNSWhy does port forwarding not work even though I configured it?
Common causes are CGNAT/double NAT, wrong internal IP, local firewall, wrong protocol/port, or testing from inside without NAT loopback.
Security & accessWho is this unknown device on my Wi‑Fi?
Identify it using manufacturer, hostname, MAC and activity; phones may use private/random MAC addresses. Pause—not permanently block—while confirming with household members.
Security & accessWhy is my own phone shown as a new device every time?
Private/randomised MAC addressing can make the same phone appear with different identifiers, especially per SSID or after privacy-setting changes.
Security & accessWhy is a device connected but paused?
Paused devices can remain associated to Wi‑Fi while internet access is blocked by a profile or manual control. Resume only with authorised account-holder approval.
Security & accessWhy does a guest device not see my printer or Sonos?
Guest networks are normally isolated for safety, so local discovery and device-to-device access may be blocked.
Security & accessHas someone hacked my Wi‑Fi because it is slow?
Slow Wi‑Fi is more often coverage, interference or traffic. Check unknown devices and security alerts, change credentials if compromise is credible, and update equipment.
Security & accessShould I share my main Wi‑Fi password with visitors?
Use a guest network where available; it limits access to trusted local devices. Use a strong unique main password.
Platform operationsHow do I know whether I have eero, Plume or Calix?
Check the router label/model and the management app: eero app, HomePass/WorkPass, or CommandIQ/provider-branded Calix app. Do not rely on colour alone.
Platform operationsCan I mix eero, Plume and Calix mesh units?
No—not as one managed mesh. They are separate ecosystems. Mixing may create multiple SSIDs, routing layers and roaming problems.
Platform operationsCan support reboot my router remotely?
Where platform access and consent allow, yes—but support should first inspect telemetry and warn of temporary loss of internet, voice and safety-connected devices.
Platform operationsWill a factory reset fix my Wi‑Fi?
It is a last resort because it removes configuration and can disconnect every device. Use targeted diagnostics, restart and configuration checks first.
Platform operationsWhy did Wi‑Fi change after a firmware update?
Updates can alter channels, security compatibility or client behaviour; they may also fix defects. Correlate timing, version and affected devices before rollback/escalation.
Platform operationsCan you see what websites I visit from the Wi‑Fi system?
Support tools may show device/network health and, where a subscribed security service lawfully provides it, limited category/security events—not necessarily full page contents. Access must follow privacy, safeguarding and account authority.
Platform operationsWhy can support see my router but not fix my printer app?
ISP telemetry covers the access network and Wi‑Fi connection; the printer’s driver, cloud account and app belong to the device maker. Support can isolate the layer and hand off evidence.
Expert casesWhy does multicast or mDNS fail across VLANs?
Discovery protocols are normally local-link. Crossing VLANs needs an intentionally configured reflector/gateway and security policy; simple routing may not be enough.
Expert casesCould IGMP snooping break Sonos or IPTV?
Incorrect multicast handling can cause flooding or failed delivery. Whether snooping helps depends on switch/router topology and querier behaviour.
Expert casesWhy do some clients fail on DFS channels?
Older or region-mismatched clients may not support all DFS channels, and radar events can move the network. Check client regulatory domain and driver.
Expert casesWhy does a device get 169.254.x.x?
That is a self-assigned link-local IPv4 address, usually meaning DHCP did not provide a lease. Check association, DHCP scope, VLAN and duplicate servers.
Expert casesWhy do I see intermittent duplicate IP warnings?
A manually assigned address may overlap DHCP, a stale reservation may exist, or two DHCP servers may be active due to a second router.
Expert casesWhy is mesh backhaul good but the client still slow?
The client link may be the bottleneck: weak radio, old standard, power saving, interference or driver. Backhaul and fronthaul are separate links.
Expert casesWhat causes bufferbloat?
Large queues fill during upload/download, increasing latency even without packet loss. Test idle versus loaded latency and manage heavy traffic/QoS where supported.
Expert casesWhy does TCP test fast but UDP voice/gaming fail?
TCP retransmits and adapts, masking some loss; real-time UDP often cannot recover late/lost packets. Measure loss, jitter and path-specific filtering.
Expert casesCould MTU cause VPN or website problems?
Yes. Encapsulation can make packets too large; broken path-MTU discovery may cause stalls. Test under the VPN/provider’s approved MTU guidance.
Expert casesWhy does hairpin NAT testing fail from inside my home?
Some routers do not support NAT loopback, so the public hostname works externally but not internally. Test from mobile data and consider split DNS.
Expert casesShould I use powerline adapters for mesh backhaul?
They may work, but performance depends heavily on electrical circuits, noise and consumer-unit layout. Ethernet is more predictable.
Expert casesCan radar, microwaves or baby monitors affect Wi‑Fi?
Yes. Microwaves and many consumer devices can raise 2.4 GHz interference; radar triggers DFS channel moves on 5 GHz. Correlate time/location and radio metrics.
Expert casesWhy does Wi‑Fi drop when Bluetooth is busy?
Bluetooth shares 2.4 GHz spectrum; poor coexistence drivers or a congested environment can hurt some clients. Try 5 GHz, update drivers and compare.
Expert casesIs a mesh hop expected to halve speed?
A same-radio wireless relay can reduce available airtime, but the actual impact varies with radios, backhaul quality, channel use and traffic. It is not a fixed 50% rule.
Expert casesWhy does Wi‑Fi calling fail while normal internet works?
Wi‑Fi calling relies on the mobile operator’s secure tunnel, DNS/NAT and handset provisioning. VPN, firewall, CGNAT or operator outage can affect it.