Problems & fixes · Wi-Fi and home networking
Fixing slow Wi-Fi and dead spots at home
Last updated 25 October 2026 · 2 sources listed · Reading time about 3 minutes
Short answer
Start by separating the internet connection from the wireless network: test speed with a cable at the router, then over Wi-Fi in problem rooms. Many issues come from router placement, channel congestion, interference or outdated devices rather than the plan itself. Fix placement and settings first, and only then consider mesh nodes or access points.
Who this is for: A household that experiences slow speeds, dropped video calls or rooms with no signal and wants to find the cause before buying equipment.
What to evaluate
Wired baseline speed
If the cabled speed is already poor, the cause lies with the line or provider, not the wireless network.
How to check: Connect a computer to the router by Ethernet and run a speed test at a quiet time.
Router placement
Routers in cupboards, floors or corners lose signal to walls, furniture and metal objects.
How to check: Move the router to a central, elevated, open position and retest in the problem rooms.
Channel and band congestion
Neighbouring networks crowd the same channels, especially on the common longer-range band.
How to check: Use the router's channel options or a scanning app and try a less busy channel or the higher-speed band.
Interference sources
Microwave ovens, baby monitors and cordless phones can disturb wireless signals.
How to check: Check whether problems coincide with using those appliances.
Device capability and age
Older phones and laptops only support slower wireless standards and can drag down shared airtime.
How to check: Look at the device's supported standard and test speeds on a later-generation device in the same spot.
Router firmware and load
Outdated software and too many connected devices lead to dropouts.
How to check: Update firmware, restart the router and review the list of connected devices.
Comparison
| Symptom | Likely cause | First step |
|---|---|---|
| Slow everywhere, even by cable | Internet line or provider issue | Test at the router and contact the provider |
| Fast near router, poor in far rooms | Distance and walls | Reposition router, then consider mesh or access point |
| Slow at certain times of day | Congestion on channel or provider network | Change channel or compare with wired speed |
| Random disconnects | Interference or failing hardware | Update firmware, move away from interfering appliances |
| Video calls stutter | Upload limits or crowded airtime | Prioritise the device or use a cable |
Decision worksheet
Rate up to three options against this guide’s own criteria. It runs in your browser and saves only on this device. It is a thinking aid, not a recommendation.
1. Have you checked each criterion?
0 of 6 criteria checked.
2. Compare options (0 = fails or unknown, 3 = meets it well)
| Criterion | |||
|---|---|---|---|
| Wired baseline speed | |||
| Router placement | |||
| Channel and band congestion | |||
| Interference sources | |||
| Device capability and age | |||
| Router firmware and load | |||
| Total (max 18) | 0 | 0 | 0 |
Questions to ask before you commit
- Does my internet plan's advertised speed match what the provider's line delivers at the router?
- Is my router old enough that it no longer receives firmware updates?
- Can the provider supply a later-generation router or must I buy my own?
- Are there network cables I could use for the busiest devices?
- Does my router support separate bands and how do I choose between them?
- Does the router allow prioritising traffic for calls or gaming?
- Is there a warranty or return window on equipment I am about to buy?
Typical trade-offs
Use the higher-speed band
- Upside
- Faster speeds with less crowding
- Downside
- Shorter range through walls
Replace the router first
- Upside
- Fixes ageing hardware and improves standards support
- Downside
- Will not fix a line fault or a poorly placed router
Add a cable to a heavy-use device
- Upside
- Removes that device from the wireless airtime
- Downside
- Requires cable routing and a free port
Common mistakes
- Buying a faster plan before checking whether the home network is the bottleneck.
- Leaving the router on the floor behind a television; raise it and clear the surroundings.
- Setting channel width to the widest option in a crowded area, which increases interference.
- Ignoring firmware updates for years; check for updates or replace unsupported routers.
Related questions
Why is my Wi-Fi fast near the router but slow elsewhere?
Wireless signals weaken with distance and when passing through walls, floors, mirrors and appliances. The higher-speed band is especially vulnerable to obstruction, so devices far away may fall to slower rates. Moving the router to a central position, switching channels, or adding an access point or mesh node closer to the weak area usually helps. Measure speeds in each room before and after any change to judge the benefit.
Should I reboot my router regularly?
An occasional restart can clear temporary faults, but needing frequent reboots signals a deeper problem such as outdated firmware, overheating or hardware failure. Update the firmware first, make sure the unit has ventilation, and check that it is not overloaded with devices. If instability persists, ask your provider to test the line and consider replacing the router, especially if it no longer receives security updates.
Can neighbours' networks slow mine down?
Yes, in dense housing the shared channels become crowded and every network has to wait its turn, which reduces throughput and raises delays. Choosing a less busy channel, using the higher-speed band, and reducing the channel width can all help. Many routers choose automatically but not always wisely, so manual selection after scanning nearby networks can be worthwhile. Wired connections avoid the problem entirely for fixed devices.
Do wireless extenders from the router vendor work better?
Vendor-matched extenders can be easier to configure and sometimes support seamless roaming, but a basic repeater still halves throughput when it relays over the same radio. They suit a single weak area rather than whole-home coverage. If performance matters, a unit with a dedicated backhaul or cable connection is preferable. Read the specification to see whether the extender has a separate channel for relaying traffic.
Sources and further reading
These pages were reachable when we last checked. They informed definitions and rules referred to above; they do not endorse this guide. Where rules differ by country, check the authority for your location.
- Consumer guides and resources — Federal Communications Commission, retrieved 27 October 2026
- Wi-Fi Alliance — Wi-Fi Alliance, retrieved 27 October 2026
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