An unlocked phone is the key to getting service from an alternative carrier. Here's how to check if a phone is unlocked.

Most Android phones these days come with a locked bootloaderâ the program that boots up the operating systemâ so users canâ t replace the stock OS or gain root access by default. The bootloader has to ...

It's not always easy to tell if an Android device is locked to a cellular/wireless provider, but there are methods to retrieve this information. If your device is locked, it will only take SIM cards ...