Connecting old Apple TV to T- Mobile home Internet
How to connect original Apple TV with T- Mobile home Internet service
Question marked as
Original Apple TV? You mean the white and silver slab?
That one is no longer supported and depending on T-Mobile’s router config may or may not be able to connect to it over Wi-Fi. You should still be able to plug in an Ethernet cable directly form the Apple TV to the router though.
If you have a little black box, that’s a second gen or later Apple TV, not the original.
You can go to Settings->Network and find your Wi-fi network there to connect to.
Link-> Change network settings on Apple TV - Apple Support
Link-> Identify your Apple TV model - Apple Support