Iphone4s Fast upgrade iOS8 method Apple 4s upgrade iOS8 Official Edition upgrade tutorial

Method I, OTA update

Open your Apple 4s wifi network and then click "Settings"-"General"-"Software Update" on it.

Method II, use itunes to update equipment

Now we click on "version" in "Summary" in itunes, which is connected to the computer on the phone, and select "Check Update" If you click on the iOS8 will automatically update your phone.

Method III, manually download iOS 8 firmware and then update with itunes

This method applies if you do not have the official update package at the same time we can download the system and then connect the phone with the computer, and then open itunes in the computer, hold down SHIFT, and click "Restore", select the corresponding version of the iOS 8 firmware to restore it.