Updating to 7.1.2 (iTunes/Finder)

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Required Reading

Unfortunately, there is currently no jailbreak available for firmware version 4.2.5 on iPhone 4 (CDMA) devices. However, this device can update to 7.1.2 and jailbreak using pangu7 instead.

Due to the age of this iOS version, you will need to use iTunes or similar to manually update the device to iOS 7.1.2, as updating on the device was not a thing at the time of iOS 4.2.5.

Updating to 7.1.2 using iTunes/Finder

1. Plug your device into your computer.
2. On iTunes or Finder, locate your device.
3. Select Check for Update.
4. Select Download and Update
   • Ensure that the version you are updating to is iOS 7.1.2