This is not as easy as it sounds — and it’s not common advice. But there’s a new warning for iPhone and Android users to ...

Your phone's SIM card allows the device to make calls, send texts, and connect to the internet. The SIM card provides a phone number that identifies your device on the carrier's network, whether it's ...

Samsung's Galaxy smartphones allow you to protect your personal information by locking your SIM card with a PIN. While you should choose your code with care, you always have the option to change your ...

It may be useful to change the PIN code of a newly purchased iPhone (if the PIN is set to 0000 by default for example) or for safety reasons to protect from fraudulent use of your phone in case of ...