Why does my mobile phone automatically delete when it receives a 186 message?

If the mobile phone automatically deletes short messages, suggestions are as follows:

1. Check whether the "Delete Old Messages" setting is turned on: Messages-More-Settings-More Settings-Delete Old Messages-Off (the operation paths of different 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 deletes SMS automatically, please back up the data (contacts, information, photos, etc.) in the mobile phone and try to restore the machine to factory settings.

if the problem still exists, please bring your purchase invoice, warranty card and mobile phone to the local Samsung service center for inspection.