Prepare your iPhone for transfer
1Open the Settings application on your iPhone.
2Tap on Messages.
3Slide the iMessage switch to the Off position. This turns off iMessage on your iPhone.
4Connect your phone to computer.
5Launch iTunes and make sure you have the latest version
6Select your device and under “Backups” uncheck “Encrypt iPhone backup”.
7You will be prompted to enter your Apple ID password.
8Cancel the backup prompt when it appears.
*iMessage and iPhone is a trademark of Apple Inc., registered in the U.S. and the other countries.