If you feel that the official version of iOS8.0 is not perfect yet, you still have a chance to downgrade to iOS7.1.2. However, this method will not be valid for a long time. Generally, Apple will disable the verification of the old system within a few days after the new system is released. At that time, you will not be able to downgrade through this tutorial.
Method 1: official recovery
Downgrade description:
This method is applicable when the latest iOS7.1.2 system verification is not disabled
Procedure:
1. Connect iphone ipad iTouch to your computer and open iTunes
2. Press Shift on the keyboard and click the left button to restore iTunes (as shown in the figure)
3. The dialog box will pop up in iTunes, and then select iOS 7.1.2 firmware (download)
4. You must activate the device after the successful upgrade and recovery of iOS7.1.2)
