When you buy a new phone from AT&T Wireless, your eSIM or SIM card is set up and activated. However, when you switch to AT&T and bring your existing phone, you must activate ... your SIM kit from AT&T ...

If you have one of the compatible Metro by T-Mobile Android ... you may need to buy a SIM card kit. When you get the SIM card, insert it into the tray on your device and activate it.

If you have got a new Jio 4G SIM, you need to activate it before it can be used on your phone. Activating the Jio SIM is a simple process that you can do in the following steps quickly. Whether ...