What if Apple's mobile phone update keeps showing "verifying"?

1, Apple's mobile phone update always shows "verifying", because the system update time will be a little longer. If the waiting time exceeds 15 minutes, it means that the mobile phone is stuck.

2. You can press and hold the power button in the upper right corner, the button below the home screen and the home screen button 10 seconds to restart the phone.

3. You can also connect your phone to your computer's itunes and click "Restore iphone" to reinstall your phone system.

4. But neither of the above two operations can guarantee that the previous data can be retrieved, because it suddenly got stuck on the way of reloading, and the system may have crashed.