Go to the Apple after-sales center for inspection.
If your iPhone has a screen, you can check it at Apple's after-sales center. If there is any problem, change the screen as soon as possible to make the phone look brand-new!
Restart or update the system
If the phone has a screen, you can try to restart or update the system. Full screen mobile phone? Press and hold the volume+and power button at the same time, and turn it off easily. Not full screen? Long press the power button to get it done!
Super simple system upgrade
Upgrading the mobile phone system is super simple: open the settings, click General, and then click Software Update. When the mobile phone is automatically detected, the new system will click "Download and Install". Wait until the phone becomes smart and a new system is installed!
Tips for using iPhone
1 Close the vertical screen lock: Open the control center, click the "rotation arrow", and the horizontal screen and vertical screen can be used as you like! When watching a video, it is more comfortable to watch it vertically. Turn on the flight mode: the "airplane" button in the upper left corner of the control center, and the one-button flight mode allows you to stay away from interference and focus on the present.