Mobile phone texting poisoning, all contacts in the phone book are lost. And the phone can't be restored to factory settings. How to solve it?

First of all, I want to tell you that cell phone poisoning is absolutely impossible, because you only sent a text message. What you can do now is to take down the memory card and turn it on first. If all the numbers appear, it's OK. Take the memory card to the computer for disinfection and then repair it. If the problem still exists after taking out the memory card, it is the only thing you can do to restore the factory settings, but I'm a little depressed that you can't restore it, so I won't talk about it for the time being. If you are sure that you have a contact number in your mobile phone, it is recommended to have it repaired. This kind of problem belongs to the problem of mobile phone firmware, and you can't rule it out yourself. If you go after the sale within the warranty period, the problem will be solved for you free of charge after the sale.