Tmobile no internet on MUDI GL-E750V2

After inserting SIM card i get "no internet" i have rebooted the router and even tried a full reset with no luck. Tried different sim cards with the same result. Pls can you help. I was gifted this brand new router and not working right out of the box.

Connect to the router via wifi, go to 192.168.8.1 and set up.

It does not dial before you click "Auto setup"

If the phone OS notice the Wi-Fi network does not access Internet, ask still to connect, please select yes, that can access the router IP 192.168.8.1