You can restore content from an iTunes backup when, for instance, you update the phone software. To restore the content, you need to back up the phone memory using iTunes.
Step 1 of 7
Connect mobile phone and computer
Before you connect your mobile phone and computer, you need to install iTunes on your computer.
Connect the data cable to the socket and to your computer's USB port.
Step 2 of 7
Restore iTunes backup
Click iTunes.
Step 3 of 7
Restore iTunes backup
Click the iPhone icon.
Step 4 of 7
Restore iTunes backup
Click Restore Backup....
Step 5 of 7
Restore iTunes backup
Click the drop down list next to "iPhone Name".
Step 6 of 7
Restore iTunes backup
Click the required backup.
Step 7 of 7
Restore iTunes backup
Click Restore and your mobile phone restores the content of the selected backup.