This guide shows you how to activate a physical SIM card or eSIM on your Metro by T-Mobile device. A physical SIM has been the traditional form of SIM card used since the first mobile wireless ...

Remove the SIM card from its packaging and place it on the tray. The kit has nano, micro, and standard sizes. Insert the SIM card into the tray. Turn your device on. Go to boostmobile.com/start to ...