For iPhones, iPads and iPod touches,Restoration can be done on-device or via iTunes. Of course, these actions are not revers-able, so double-check that all content is backed up and/or on another device before proceeding.
To wipe a device using iTunes, plug it into a Mac or PC, and locate the device in iTunes’ sidebar. Click on it, and you will be presented with a screen about the device, then follow the following steps.
- Switch off your Device
- Connect your iOs device with computer via USB Cable.
- During connection with computer,Keep holding the Home button.
- Don’t release the Home key when you see the iTune scree has appeared.
- When you see this screen,
“iTunes has detected an iPhone in recovery mode”
you have to restore your iPhone.
You may use these steps when you find your iPhone completely non-responsive, even when connected to iTunes via the USB cable.