You should use a strong Lock Screen passcode to ensure thieves can't observe you entering your PIN and then stealing your iPhone. And we've shown you how to set up a stronger iPhone Lock Screen ...

If you have a SIM card PIN enabled on your phone to access data on the SIM card, but you repeatedly enter it incorrectly, the SIM card may lock you out from further attempts. You can reset the SIM ...

Many people are now using smartphones as portable storage of important files. Aside from the fact that they can access the file at any time when needed, modern smartphones also offer higher security ...