On an Android, go to Settings > About Phone > Status. A simple way to check if your device is unlocked is to insert a ...

turn off your Android device, bend your paper clip straight, insert it in the SIM tray pinhole, and press gently until the tray pops out. Most devices just have a single SIM card slot, but some ...

If you have one of the compatible Metro by T-Mobile Android phones ... or 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 ...