How to back up your old iPhone to iCloud
- Launch Settings app on the iPhone
- Tap on iCloud
- Tap Backup>> Back Up Now and wait for the process to complete.
How to transfer your data from old iPhone to iPhone 6/iPhone 6 Plus with iCloud service
- Select Restore from iCloud backup on the next screen
- Sign into your iCloud account and tap next
- Choose backup
- Wait for the iPhone to restore from iCloud.
How to transfer your data from old iPhone to iPhone 6/iPhone 6 Plus with iTunes service
- Restore from iTunes backup
- Select most recent backup.