Graphic tutorial on downgrading iOS from iOS to iOS

Preparatory work

1. Download the corresponding Iphone4s iOS7.1.2 official version of the firmware
2. Because this recovery ios7 will wipe out all the data in the phone, so we'd better back up the data (recommended reading: Apple iphone Backup)

Start iOS8 demotion iOS7.1.2

1. After connecting the iphone4s to the computer, itunes automatically pops up, and if we do not click itunes on the pop-up, we open it.

2. After opening itunes, we press shift+ the left mouse button click on the itunes update function/restore function (figure)

3. In the Open interface we found the corresponding firmware that had just been downloaded--click Update--and wait for itunes to run.

4. Well, then we can activate it.