Why are my messages automatically deleted?

It may be that there is not enough storage space, the memory automatically released by the mobile phone, or you may have accidentally set it.

First, the solution:

1. Check whether the "Delete old information" setting is on: Information-More-Settings-More Settings-Delete old information-Off (the operation path of different models of mobile phones may be slightly different).

2. If it has been turned off, please check whether the third-party SMS software is installed in the mobile phone and check whether there are relevant settings.

3. If the mobile phone still automatically deletes the SMS, please back up the data (contacts, information, photos, etc. ) and try to restore the machine to factory settings.