1. First, install Apple's itunes software on the computer and open it, as shown in the figure below.

2. Next, connect the mobile phone and the computer with the data cable of the mobile phone. At this time, a mobile phone icon will appear on itunes software, and a window for entering apple id password will pop up, as shown in the figure below.

3. Enter the apple id password correctly, and then click the mobile phone icon. At this time, you will enter the iPhone summary interface, where you can see the option to restore the backup, as shown in the figure below.

IOS 15 is a mobile operating system developed by Apple, which was released at the 20021Apple Global Developers Conference on June 8th, Beijing time.

IOS 15 brings a new FaceTime and notification interface, and improves applications such as photos, weather, wallets and maps.

As of October 7, 2002110, the official version of iOS 15 has been updated to iOS 15.0. 1, and the beta version has been updated to IOs15./kloc.