Think of all the music you've collected on your phone over the years. All those thousands of pictures and videos, your favorite games, the apps you can't live without, not to mention your contacts and emails. You've got a lot of data on your phone. Let's talk about relocating it, so it's ready and waiting to be transferred to your new phone.

Backing up

Backing up your iPhone makes it possible to transfer your old data to your new phone

Before you start: Make sure to save and close your files before copying them from your phone to your computer

First, decide which backup method is right for you: iTunes or iCloud.
• If you have lots of photos or videos on your camera roll (1 GB or more), then iTunes is your best option
• If you rarely (or never) connect your phone to a Mac or PC, iCloud is the way to go

Good to know: iCloud backs up information about the music, movies, TV shows, apps, and books you've purchased but not the purchased content itself. iCloud also backs up your photos and videos, unless you turn on iCloud Photo Library on your iOS device (iOS 8.1 or later).
If you turn on iCloud Photo Library, your photos and videos are already stored in iCloud, so they aren't included in your iCloud backup.

Backing up in iTunes
• Connect your iPhone to a Mac or PC
(keep in mind you can only back up your iPhone on one computer)
• Open iTunes on your computer
• Select File > Devices > Back Up 

Backing up with iCloud
• Select Settings > iCloud > Back Up, then turn on iCloud Backup.
• Your phone will now automatically back up your data when the phone is plugged in, connected to WiFi and the screen is locked.
Want to back up data manually?
• Select Settings > iCloud > Backup > Backup Now 

Don't forget to sign out
This is a BIGGIE. Make sure to sign out of iCloud after you back up your data. If you don't sign out, all that data you just backed up? Poof, it'll be gone. But that won't happen, because here's what you're going to do once you've backed up your data using iCloud:
• Select Settings > iCloud > Sign Out
If your phone has iOS 7 or a later version, choose Delete Account. If you delete all of your data manually without signing out of iCloud, it will delete the content from iCloud, as well. And that would be a major bummer. 

Don't forget to sign out
This is a BIGGIE. Make sure to sign out of iCloud after you back up your data. If you don't sign out, all that data you just backed up? Poof, it'll be gone. But that won't happen, because here's what you're going to do once you've backed up your data using iCloud:
• Select Settings > iCloud > Sign Out

If your phone has iOS 7 or a later version, choose Delete Account. If you delete all of your data manually without signing out of iCloud, it will delete the content from iCloud, as well. And that would be a major bummer.