Did you know that Apple has endowed the iPhone with seven secret codes? Of course not, or else they wouldn’t be secret. The Sun released a list of these secret codes describing exactly what they do.
These codes can save you time when it comes to looking for information or activating certain features on your iPhone
Many of you know exactly what an IMEI number is. The International Mobile Equipment Identity is an identifier unique to your phone. If you decide to unlock your device to join another carrier, you’ll need to have this number handy.