There are several secret codes that can be used to troubleshoot common issues on your iPhone. Some of the most common ones include:

  • *337#: This code will display the IMEI number of your iPhone, which can be helpful if you need to contact your carrier for support.
  • #4377#: This code will enter your iPhone into Service Mode, which can be helpful if you need to troubleshoot hardware issues.
  • *#9999#: This code will open the Emergency Calls menu, which allows you to make emergency calls without having to unlock your device.