Hi @Cabecita   

Thanks for reaching out to us. 

Do you have problems with the configuration of your extender?

If yes, please refer to below guide to set up your extender. If you have other concerns, please let us know and provide us more information. 

How to configure Range Extender via Tether APP

Configure it via web UI: 

How to configure my range extender via web GUI to extend an existing wireless network's coverage (new logo)?
More details please refer to our video if needed: https://youtu.be/oolmHBv7id8

If the above suggestions can't help you out, please share us with more details for the failure of the configuration, such as what's the prompt message when the configuration finished, the status of the LEDs in the device.