Hello @MusTy071 ,

Welcome to our community.

Is the wired speed normal after the firmware update? Here are some troubleshooting steps that you can try:

Wireless Speed Troubleshooting:

1. Simplify and test: Connect only one device to the router via wireless and run speed tests three times without any high-bandwidth activities (like downloads). Take screenshots of the results.
2. Check wireless link speed: Verify the wireless link speed on your devices and take screenshots. You can refer to this guide: How to check the associated/link speed on a wireless client
3. Optimize Channel Width:
   • For 2.4GHz: Set to 40MHz
   • For 5GHz: Set to 80MHz
   • Guide here: How to change wireless settings on TP-Link DSL Modem Router
4. Try 5GHz band: If your devices support 5GHz, connect to that band to see if performance improves.
5. Router placement: Ensure your router is in an open space at 0.3-0.5 meters height (like on a tabletop), away from microwaves, refrigerators, or metal objects.
6. Optimize channels: Set 2.4GHz channel to 1, 6, or 11 with 20MHz bandwidth, and 5GHz channel to 36-48 or 149-165 with 40MHz bandwidth.