How to completely delete Unicom's mobile phone calls and SMS records?

Deleted cell phone call records and SMS records cannot be recovered, and they have not been backed up in advance.

If you need to delete the number in the call record, it is recommended to do the following:

1. Personal call records are deleted separately: open the phone icon-click the record-delete the number as needed-delete.

2. Delete all or multiple items: open the mobile phone icon-click Record-Menu button-Delete-check the number to be deleted to delete.

The method of deleting SMS on Android phone: open SMS-long press a message-select Delete.