@Nixos That's really interesting. Are you upgrading through the Tether app or through a computer web browser. If the former try with the computer browser and see how it goes. If the latter use...

@L108 Here's a guide how to configure the device in range extender mode. Video guide is available as well. When you're ready to place your TL-WR841HP make sure it's not too far from your main router....

@Nixos Use this gude for upgrading the device FW. Case 1 - for manual update Case 2 - for automatic TP-Link Cloud update If automatic update doesn't work for you then try the manual update.

@Jimkbo The device life expectancy can't be predicted with high level of certainty. There were devices that lasted more than 10 years, while still operational and others that failed on the second...

@Szinigami Here's the list of devices that have been addressed regarding CVE-2021-45608.

@joey1998 Using the reset nutton: If that doesn't help contact your local support to be advised further (especially if the device is under waranty).