The device will prompt you to enter the code after turning it on, when the SIM PIN lock is enabled or turned on. Here’s how to lock and unlock the SIM card on your Galaxy Note 5 handset: ...

A SIM pin forces you to enter a specific pin every time your iPhone is turned off or rebooted. This ...

Finally, enter your SIM PIN to lock it - once it's locked, it will prompt you to enter it before using your SIM card, meaning fraudsters will hit a wall. If you don't know your SIM PIN ...

Want to keep your phone secure? Avoid using this common PIN code - here's why it's risky and what to choose instead.

Want to keep your phone secure? Avoid using this common PIN code — here’s why it’s risky and what to choose instead.