Why are the text messages and contact lists missing from my mobile phone?

See if your phone number is stored in your mobile phone or card, and check it yourself. Besides, if you do something wrong, or play with children and delete it, it's the phone itself. You can check whether the configuration settings of the mobile phone have been restored to the factory mode. If so, it was artificially restored or the phone itself was mistakenly restored. In order to avoid the important contact number information being erased, it is best to store it in the sim card. Don't covet to save the powerful functions of mobile phone contacts (now the phone information of a mobile phone can store several phones, addresses, photos and so on. Once the mobile phone breaks down, I will suffer. Although the number will not be cleared when it fails, this is just in case)