How to Update and Restore an iPhone to 4.0
- 1). Plug the provided USB data cable into the USB power port on the bottom of the iPhone 4.0. Insert the other end of the cable into a USB port on the computer and momentarily iTunes will load onto the screen.
- 2). Select the iPhone listing under "My Devices" on the left side of the screen. This loads all the data relating to your iPhone into view. If an update is available you are informed of this via a pop-up window.
- 3). Select "Yes" when asked if you want to download and install the update. Do not disconnect your iPhone while iTunes downloads and updates the device.
- 4). Select "Restore" in the middle of the iPhone listing in iTunes if you want to return the device to factory settings. A prompt appears asking if you are sure you want to perform this task. Click "Yes" and the iPhone 4.0 restores itself.