Backing Up you iPhone
Connect your iPhone to your computer. Make sure iTunes is installed. You will need to authorize your computer for you iPhone when it is requested.
Select your phone at the top-left of the application where it will take you to your phone’s settings and files.
Under the “Summary” tab, you will see a section called “Backups”
You can select to automatically back up to This Computer. If you select “Encrypt iPhone Backup”, you will be required to use a password. This will allow your phone to save passwords for different applications that are currently stored on your phone and save time later.
Click “Back up now”. iTunes will request that you enter your iCloud password, which is the same password used for purchasing/installing apps.
Once complete, the backup will be stored on your computer. This will include all of your apps, documents, music, and settings/configurations for your apps including e-mail. Now you are able to connect a new phone to your computer and select "Restore from backup" in iTunes.