@Dvg What's the hardware version of your RE200? It's on the label, such as Ver:1.0. Please make sure that your RE200 version is in the Tether APP Compatibility List. If not in the list, then Tether...

Yes, I think so. But which one will you buy?

@Aloke_blr What's the hardware version of your RE305? It's on the lable, like Ver 3. It's suggeted to update the firmware on RE305, check this: RE305 firmware

@Aloke_blr What's the hardware version of your RE305? It's on the lable, like Ver 3. It's suggeted to update the firmware on RE305, check this: RE305 firmware

@Rafale Reset your extender: How to hard reset TP-Link wireless access points, extenders to factory defaults Configure extender: How to configure Range Extender via Tether APP

@Eric_Chia 860RE is conigured via WPS? Please try to reconfigure it via Tether app: How to configure Range Extender via Tether APP