Slow Wi-Fi usually comes from one of a few causes: a weak signal, too many busy devices, interference, or a problem with the line itself. Work through the checks below in order, and stop when things improve. Each one is quick and needs no special tools.
Step One: Find Out Where the Slowdown Lives
Try the same page on two or three devices. If only one is slow, the device is the likely cause. If all are slow, look at the router and the connection. Then walk closer to the router and try again; if speed improves sharply, distance or obstacles are the issue.
Checks to Work Through
- Reboot the modem and router using the maker’s recommended order, then wait a few minutes.
- Check that all cables are firmly seated and not bent or damaged.
- Move the router to a more open, central and higher position.
- Pause large downloads, cloud syncing and streaming on other devices.
- Disconnect devices you are not using from the network.
- Look in the maker’s guide for a way to update the router’s system software.
- If your router offers more than one wireless band, try the other band. The faster one is usually better at short range, the slower one at longer range or through walls.
- Connect one device by cable to see whether the problem is wireless only.
Common Causes at a Glance
| Symptom | Likely cause | Try this |
|---|---|---|
| Slow only in far rooms | Distance and walls | Move the router or add an extender or mesh unit |
| Slow in evenings | Busy household or shared line | Pause heavy use, ask your provider |
| Slow on one device | Device age or settings | Check that device’s network settings and updates |
| Slow even by cable | Line, modem or plan | Contact your provider |
Things That Quietly Add Interference
- Neighbouring networks on the same wireless channel.
- Microwave ovens and cordless phones near the router.
- Thick walls, mirrors and large appliances.
Some routers can choose a less crowded channel automatically. Look for that option in the maker’s instructions.
When the fix is not obvious. Sometimes the cause is a mix of small things: a router in a poor spot, a few busy devices, and a crowded channel. Change one thing at a time and test after each change, so you know what helped. Write down each change and its result. If you change three things at once, you will not learn which one mattered.
If you have worked through every step and the problem persists, gather your notes and contact your internet provider or the router maker.
FAQ
Does an older router slow things down?
It can, because older models may support only older wireless standards. Check the maker’s information about what your model supports.
Will more devices always mean slower Wi-Fi?
Not by themselves. Idle devices use little, but several busy ones sharing the connection can slow everyone down.
The Short Version
Narrow the problem to one device, one room or the whole home. Reboot, check cables, improve placement and reduce busy use. If a cable connection is also slow, the cause is outside your Wi-Fi and your provider is the next call.