press and hold the Power button for several seconds, and then slide it off when the red slider appears on the screen. Sometimes the iPhone crashes or doesn't respond, so it can't be shut down by normal methods. You can use forced restart and forced shutdown to get the iPhone back to work. Forced shutdown: press and hold the Power (power key/on/off key) Home button at the same time, and release the Home button after the black screen appears. The white Apple Logo will appear within a few seconds after the Home button is released.

at this time, don't release the Power button, and wait until the white Apple Logo disappears and the screen closes to complete the shutdown. Forced restart: Press and hold the iPhone's power and Home button for a few seconds at the same time, and then let go when a white apple appears on the phone screen. After that, the iPhone automatically restarted. 1iphone4 crashed. What's the matter? The simplest trick is to press the HOME key and the On/Off key together. After waiting for 15 seconds, the machine will automatically restart. This is Apple's hard start, which is equivalent to the reset function.

it's better to check why it crashed when restarting. It may be that unstable or conflicting software is installed, or it may be a bug unknown to the system itself. 3 Common situations are as follows; Look at your recently installed software or games. It is possible that the recently installed software conflicts with Apple's system functions, which leads to a crash or restart. This problem is relatively easy to solve. Just uninstall the recently installed software or games.

It's best to use some tools such as mobile assistants to clean up mobile phone garbage and optimize the operation efficiency of mobile phones. 5 If the phone can't be restarted, the screen is always black. It is recommended to find a professional to refresh the firmware system.