You can use it to enter iPhone secret codes to do all kinds of things, such as troubleshooting, checking IMEI, and hiding your caller ID when you make outgoing calls. But what are iPhone secret ...

An curved arrow pointing right. Did you know that there are actually a handful of secret iPhone codes? Well it's true, and the features range from extremely useful (like showing your exact signal ...

An curved arrow pointing right. The iPhone has a handful of secret codes — some are very useful for everyone, some may only be useful for some. You can show your exact signal strength ...

Apple said at the time that the security of its proprietary software isn’t key to iPhone secrecy, but the company still filed a copyright claim to remove the leaked iBoot source code from Github.