What's wrong with Apple's SMS interface?

Apple's SMS interface won't open. Maybe it's just a system error. You can try restarting the iPhone. If it cannot be solved, it is recommended to refresh the system.

IPhone brushing steps:?

1. Turn off the iPhone.

2. Press and hold the On/Off button and the Home button at the same time after shutdown.

3. When the white Apple logo is displayed on the screen, please release the On/Off button and continue to press and hold the Home button.

4. On the computer, find and double-click the itunes program, which will prompt you to resume mode.

5. Hold down the shift key and click the Restore button to select the corresponding firmware version.

6. When selecting, double-click the corresponding firmware software directly to start automatic brushing. ?