Wi-Fi is slow in the whole house

Symptoms

• Every device is slow, not just one room
• Speed test is far below your plan's advertised speed
• Wi-Fi was fine before and gradually got worse
• Streaming buffers and video calls lag on all devices

Likely causes

• CommonRouter needs a restartRouters can bog down over weeks of continuous use as memory fills with connection data.
• CommonToo many devices active at onceSmart home gadgets, streaming boxes, and phones all share the same bandwidth.
• CommonInternet plan speed is actually the bottleneckWi-Fi can't exceed the speed your provider delivers to the modem.
• PossibleOutdated router or old Wi-Fi standardRouters more than 5–6 years old may not support modern speeds or handle many devices well.
• PossibleBackground downloads or updatesA device doing a large update or backup can eat most of the available bandwidth.

What to do

1. Restart the router (and modem if separate) by unplugging both for 30 seconds, plugging the modem in first and waiting for it to fully reconnect.
2. Run a speed test with a device connected by Ethernet if possible, and compare it to your paid plan speed.
3. Count roughly how many devices are connected in the router's app; disconnect ones you don't recognize or don't need active.
4. Pause large downloads, cloud backups, or game updates on any device and retest.
5. Check for a firmware update for the router in its app and install it.
6. If speeds are still far below your plan on a wired test, contact your internet provider since the issue may be on their end.
7. If speeds match your plan but still feel slow, consider whether your plan's speed is enough for your household's number of devices and streaming habits.

Tools and parts

• Speed test app or website
• Ethernet cable (optional, for testing)

When to call a pro

If your ISP confirms the line is delivering full speed but Wi-Fi still lags, a technician or IT professional can assess whether your router or home wiring needs upgrading.

Safety