What's wrong with Samsung mobile phones not saving call records and text messages?

If you can't save the phone call record, please refer to the following method: 1. Restart the phone. 2. The time and date of the mobile phone system are incorrect. If the date and time of the mobile phone system are incorrect, the current call record may not be displayed normally. You need to adjust the date and time of the system to the correct time and date in the phone settings. 3. Display mode of mobile phone call records. Please turn on the specific viewing mode: mobile phone-record-touch the menu button on the left-view mode-all records to see if you can view them. If the problem persists, it may be a software problem. Please back up your data and try to restore the factory settings. If it still doesn't work, you can try to contact the nearest service center to help you test it.