If suddenly your mobile device stops responding to any user requests for unknown reasons, then the question itself arises of how to restart the iPhone. There can be many reasons for the occurrence of "freezes". For example, a recently installed program or applications that still have to be removed could be affected. This applies especially to 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?
For starters, do not rush, you need to wait 5 minutes - it happens that during this time the device is completely restored and will work normally. You can try to close the application causing problems by pressing 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 out. Then you can continue to press the keys so that the device automatically turns on. Otherwise, you will have to use the Sleep/Wake button again.
These actions completely rebootiPhone and device recovery is completed. The last step to the normal functioning of the device will be the removal of the program causing the "freeze".
How to restart iPhone if it does not see the SIM card? Sometimes it really helps, but in most cases it has absolutely no effect. In such situations, it is recommended that you definitely seek qualified help from a service center, since it is possible to deal with this breakdown only if the user is versed in such a technique. Even a card reader can become a source of the problem, especially when the device is often hit or dropped. You can use a fairly simple repair method in such a situation - just remove the SIM card and put it back in place.
If the network is still not detected, the cause of the failure may lie in the SIM card itself. In this situation, how to restart iPhone by yourself? To make sure that this particular device is broken, you can use another SIM card and check the connection. If, when replacing the SIM card with another connection, it appeared, then the cause of the problem lies precisely in it. In this case, you should contact the operator’s salon and replace the SIM card, since the reboot process will not help in this situation.
Another cause of problems may be an incorrect firmware version. How to restart iPhone in this case? It is likely that the "firmware"you will need to reinstall or update - here, again, you will need the help of a professional. Since in this state of he alth, 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 not recommended to fix the problem on his own, it is better to use the help of a professional qualified master.