How to format iPhone to device?
First, connect iPhone to your computer via USB.
Then open the Itunes program.
On the left is a pane to help you choose your device. Select your device from there.
After selecting your device, click on the "restore" button.
After doing this, it will ask you if you want to "back up". Why is she asking if you want to back up? Let's explain immediately. If you say back up, then your information will be backed up.
After saying back up or not, you can throw the format by pressing “ok” button.
Formatting the iPhone is a bit different than the others. However, he has no difficulty. You can format your iPhone by following the steps above one by one.