Apple's SMS interface won't open. What happened?

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: \x0d\ 1. Turn off the iPhone. \x0d\2。 After turning off the machine, press and hold the On/Off key and the Home key at the same time. \x0d\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. \x0d\4。 On your computer, find and double-click the itunes program, and it will prompt you to resume mode. \x0d\5。 Hold down the shift key and click the Restore button to select the corresponding firmware version. \x0d\6。 When selecting, double-click the corresponding firmware software directly to start automatic brushing.