If you want to update the software on your mobile phone, it's recommended you back up the phone memory. Remember, you need to install iTunes on your computer before you can back up the phone memory. You can download the program from www.itunes.com.
Step 1 of 4
Start iTunes on your computer.
Step 2 of 4
Connect your mobile phone and computer
Connect the data cable to the socket at the bottom of your mobile phone to the computer's USB port.
Step 3 of 4
Back up phone memory
Depending on your settings in iTunes, backup may start automatically.
To start backup manually:
Right-click your mobile phone in the menu to the left.