When every device works except one, the internet plan and router are usually not the main problem. Focus on the slow device: its saved network profile, Wi-Fi band, background apps, driver, antenna, or hardware limit.
Does this affect you?
Use this if one specific phone, laptop, desktop, tablet, or adapter is much slower than everything else on the same Wi-Fi network. Testing against a working device in the same room helps prove the problem is local to that device.
Fix the affected device
Start with the simple device-side fixes.
- Forget the Wi-Fi network on the slow device, then reconnect and re-enter the password. This clears stale network settings.
- Check whether it is stuck on 2.4 GHz while other devices use 5 GHz. If your router has separate names, join the 5 GHz network when close enough.
- Restart the device fully, not just sleep, lock, or close the lid.
- Pause cloud backups, software updates, streaming apps, game downloads, and other background traffic on that device.
- On Windows, update the Wi-Fi driver in Device Manager under Network adapters. On Mac, iPhone, and Android, install available system updates.
- Move near the router temporarily. Some devices have weaker antennas and struggle in places where newer devices work fine.
Compare real numbers
Use speed tests to avoid guessing.
- Put the slow device and a working device in the same room.
- Run the same speed test on both.
- If the slow device is dramatically worse, keep troubleshooting that device.
- If both are similarly slow in that room, the issue may be Wi-Fi coverage instead of one device.
More control
Check router limits applied to that device
Parental controls, device priority, schedules, or bandwidth limits can remain tied to a device MAC address long after you forgot setting them. Check the router app device-management page.
Older hardware may be the ceiling
Budget phones and older laptops may have Wi-Fi chips that cannot match newer devices. If the device has always been slower, hardware limits may be normal.
Swap adapters and cables
For desktops using USB Wi-Fi, try another USB port or adapter. If the device is actually wired, test a different Ethernet cable before blaming settings.
Sources
- Microsoft Support – Fix Wi-Fi connection issues in Windows (2025)
- Apple Support – If your Mac will not connect to the internet over Wi-Fi (2025)
- FCC Consumer Guide – Wireless Network Troubleshooting (2024)