Weak WiFi does not automatically mean that you need a new router. The problem can be caused by router placement, walls and floors, interference, the wrong frequency band or simply too much distance.
Before buying new equipment, check these ten common causes.
1. Your router is in the wrong place
A router hidden inside a cabinet, placed behind a TV or sitting close to the floor has worse conditions for distributing the signal.
Try a central, elevated and open location. See Where should you place your WiFi router? and Router in a cabinet, behind the TV or on a shelf? for more guidance.
2. Walls and floors weaken the signal
Concrete, reinforced concrete, brick and floors can significantly reduce WiFi coverage. Connections between floors are especially challenging. See WiFi through concrete walls and floors.
3. The router is too far away
WiFi has a limited practical range. Increasing distance usually means lower signal quality.
Sometimes moving the router is enough. In larger homes, an appropriately placed mesh point may work better — see How many mesh nodes do you need?.
4. Other networks cause interference
In apartment buildings, many WiFi networks may operate in the same area. Interference can reduce stability and performance.
Checking the available channels and bands can help.
5. You are using the wrong frequency band
2.4 GHz generally reaches farther and passes through obstacles better, while 5 GHz can provide higher performance but has more limited range. See 2.4 GHz or 5 GHz — which WiFi band?.
6. Only one device has the problem
If your phone is slow but your laptop and TV work normally in the same location, the issue may be with the phone rather than the router.
Compare multiple devices.
7. The router is overloaded
Many simultaneously connected devices can increase router load. This matters in homes with TVs, consoles, computers, cameras, smart-home devices and phones.
8. The problem is your internet connection, not WiFi
If the connection is slow over Ethernet too, improving WiFi coverage will not fix the underlying problem. See also Why is WiFi slow despite fast internet?.
Compare WiFi performance close to the router with a wired connection if possible.
9. Your home is too large for one access point
One router may be enough for a small apartment but not for a large or multi-storey house.
The number and placement of mesh points should be based on the actual layout, walls and floors — not just the advertised square metre coverage. See WiFi mesh or extender — which is better?.
10. You have not measured the problem
Buying equipment before identifying the weak spots is a common mistake.
First test every room (see How to Check WiFi Coverage at Home? Test WiFi in Every Room). Find where signal strength, speed or stability drops. Then choose the appropriate solution.
Quick WiFi diagnosis
If WiFi is weak:
- Move close to the router.
- Check whether the problem remains.
- Compare several rooms.
- Test another device.
- Compare 2.4 GHz and 5 GHz.
- Compare WiFi with Ethernet if possible.
- Mark problem areas on your floor plan.
- Only then consider new equipment.
The key rule: do not solve a WiFi problem by simply buying a more powerful router. Find out where the problem occurs and why. See also 5 things that weaken your WiFi the most and Why doesn't WiFi reach one room?.