The PIN (Personal Identification Number) enables secure SIM card and network access. It is provided with your SIM card. If the PIN code is entered wrongly three times, the phone is locked and requires ...

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 ...

And if you don’t have your own phone number memorized, well, it goes without saying that you’ll need to look that up, too. Here’s where to find these three numbers on your iPhone.