What should I do if my mobile phone automatically shuts down after receiving a text message or a phone call?

This is a battery problem. Sometimes it is the reason that the battery inside is not in good contact with the mobile phone, but most of them are battery problems. I have two mobile phones with the same problem. The main reason is that the battery is not fully charged. I suggest you change the battery, preferably the original one. Then go to the repair point for repair, or clean the part where the battery is in contact with the mobile phone.