How To Activate My T Mobile Sim Card. Scan the QR Code or manually enter the information below. Have an ATT PREPAID plan.
The SIM card number is located on the back of the box. I had decided to change my rate plan. You then need to call 1250 using the new Co-op Mobile SIM and follow the instructions given to you over the phone.
1 Just plug a Verizon SIM card in and then plug the T-Mobile SIM card in and youll be fine.
Gather the items youll need to activate service. For ATT Wireless make sure the eSIM is on an active plan then download it over Wi-Fi. Tmobile sent me a new sim. T mobile may be the lousiest business ever ripping off consumers.
