For a modern person, a mobile phone is included in the category of basic necessities. Calls, SMS, Internet, timing and even money transfers - it all depends on the work of a small plastic box with electronic filling. However, this thing sometimes spontaneously and very inappropriately turns off.
The most common reason for the phone to shut off spontaneously is a defective battery or poor connection between the contacts of the battery and the phone. This malfunction may be due to the purchase of an initially defective product, be it a phone or a battery, or the item becoming unusable due to clogged contacts. In this case, you should try to put another battery in the phone and test it for functionality. Mechanical damage to the printed circuit board is the second most common reason for the phone to turn off. This can happen if the device is dropped frequently. You can check the relevance of this reason by trying to bend the phone. Disabling it in this case means that you have hit the mark. Sometimes the disconnection can occur due to the failure of the software (firmware). For phones of popular brands, this is rare, however, for models imported from China, this malfunction is very common. Try resetting all data on your phone to factory defaults and formatting its memory and memory card. If that doesn't help, install a new firmware. Another reason may be hidden in the corrosion of the mechanical parts of the phone. This is often the fault of the device being in water (falling into water or being doused with water). If this happens, the phone will eventually stop working completely. Also, due to falling into water, oxidation can form on the contacts of the SIM card. In this case, clean them using ethyl alcohol. A major reason for the phone to shut off spontaneously may be a malfunction of the power button. In this case, you need to replace it. Sometimes the phone turns off in severe frost. In this case, it is enough to hold the device in a warm room for a while and then turn it on.
