To check if your Android phone is unlocked, try swapping in another SIM card or test your network settings. If calls work, ...

The bootloader has to be unlocked first to flash or root your device. Hereâ s how you can check if the bootloader on your phone is locked or not.

Learn how to check if your phone is unlocked and, if it isn't, how you go about making an unlock request with AT&T, Sprint, T-Mobile and Verizon.