If suddenly your mobile device, for unknown reasons, stops responding to any user requests, then the question itself arises of how to restart the iPhone. There can be a lot of reasons for the occurrence of “freezes”. For example, a recently installed program or applications could affect it, but you still have to uninstall it later. It concerns especially beta versions of programs. Or maybe the user forgot to read reviews about the iPhone, and it turned out to be Chinese and not of the best quality, so the iPhone reboots unreasonably and constantly?
To begin with, do not rush, you need to wait 5 minutes - it happens that during this time the device is fully restored, and will work fine. You can try to close the application that caused the problems by clicking on the Home button.
If the first method fails, you can try to solve the problem in a different way - hold the Sleep / Wake and Home buttons at the same time and hold until the display goes blank. Then you can continue to press the keys so that the device turns on automatically. Otherwise, you will have to use the Sleep / Wake button again.
With these actions, the iPhone is completely rebooted and restoration of the device’s health is completed. The last step to the normal functioning of the device will be the removal of the program that causes the "freeze".
How to restart iPhone if it doesn’t see the SIM card? Sometimes it really helps, but in most cases it has absolutely no effect. In such situations, it is recommended to seek qualified assistance from a service center, since it is only possible to deal with this damage if the user is versed in such a technique. Even a card reader can become a source of a problem, especially when the device is often hit or dropped. You can use a fairly simple repair method in this situation - just remove the SIM card and put it back in place.
If the network is still not detected, the cause of the breakdown may lie in the SIM card itself. In this situation, how to restart the iPhone yourself? To make sure that this particular device is broken, you can use another SIM-card and check the connection. If, when replacing SIM cards with another connection, it appeared, then the cause of the problem lies in it. In this case, you should contact the operator’s cabin and replace the SIM card, since the reboot process will not help in this situation.
Another cause of problems may be an incorrect version of the "firmware". How to restart the iPhone in this case? It is likely that the "firmware" will need to be reinstalled or updated - here, again, you will need the help of a professional. Since in this state of operability, the iPhone becomes a useless device that does not always adequately respond to user commands, including rebooting.
Problems can arise even with the iPhone, despite all its perfection. If the result of the operation on the simplest reboot is zero, its owner is strongly discouraged from fixing the problem independently, it is better to use the help of a professional qualified wizard.