First step, open ICloud service
1. On the Apple phone we found the "settings" figure to enter the light point.
2. Then click on the "ICloud" menu in the pop-up page to enter.
3. Now you need to enter your registered Apple ID account and password, and then "login" if you do not have the right to register it. (Apple 5s How to register AppleID account number on mobile phone)
4. If the password is no problem login icloud will pop up after the "merge" in some we can choose the "Merge" button.
5. Then the system will also prompt if you want to turn on the "Find My IPhone" feature, it is recommended to click "OK" to open it, as shown in the picture
6. Now into the ICloud will see a lot of backup services, we can open also can be closed some oh.
When the 7.iCloud service is turned on, it automatically backs up the data you added to your phone as soon as the Apple is connected to the network.