Can't activate your new T-Mobile SIM? You're not alone
T-Mobile is facing a widespread issue preventing subscribers from using their new SIMs. Multiple users have reported being ...
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Metro by T-Mobile: How to activate your SIM card
If you have one of the compatible Metro by T-Mobile Android ... need to buy a SIM card kit. When you get the SIM card, insert it into the tray on your device and activate it.