@ERE What do you mean that the status bar keeps flashing after you hit finish? Have you entered the wifi password of 5GHz to set it up? Try to customize the wireless settings of 5GHz, like wireless...

@smithclarkson What is the model number of your device? Did you use the host wifi password to configure the extender? Try to disable DHCP server on the web UI and setup a static IP for it.

@Wellzevool Yep, I see; I checked the email system and found that you tried with other repeaters with the router, but still failed to connect to the 5GHz. For @ERE 's issue, we can do further...

@ERE What is the model number of the extender? Is it the RE650? What about the main router? What is the hardware and firmware version of the main router? Have you ever tried to update the firmware...

@luker Hi, to make Tether app find the extender, they should be in the same subnet. Try to connect your smart phone to the extender's wifi directly, not main routers or others. And then you can...

@TP-AC2600-RE650 What is the model number of your device? Is it RE650? The AVM 6591 you mentioned is a Fritz box. For the firmware of RE650, you can click...