How to lock your SIM on Android

Your phone's SIM card allows the device to make calls, send texts, and connect to the internet. The SIM card provides a phone ...
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3 Ways To Check If Your Android Phone Is Carrier-Locked

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 ...