@EvaK Glad to help~

@mohammedlaif I'm afraid Hardware version could not be upgraded, hardware is fixed when device was made. Only firmware could be upgraded according to hardware version, for exampole, V1 device upgrade...

@Kittiphong Hello, You could factory reset RE and see laptop and cell phone could see the SSID / WiFi signal. RESET: with RE powered on, use a pin to push the reset hole until all the Leds flash once...

@Bengibson You could refer to video here and try Tether app or Web page to set up the range extender: https://www.tp-link.com/support/download/re200/ May I know the model of your router if WPS...

@Bimblesticks Hello, Do you mean other devices except for Linux computers could obtain stable from RE? RE should provide Wireless and Ethernet connection to clients and does not have compatible issue...

@Athlonite Hello, Thank you for your detailed information, please check the Link speed of the TX401X and see if the link speed is 1G or 10G? How to check the associated/link speed on a wired client...