How to delete the SMS number of Unicom's mobile phone, and can it be completely deleted when you go to the business hall?

You can only delete the short message content and number on your mobile phone, but not those in the phone bill list. Unicom's phone bill list belongs to the consumption detailed voucher, which is generally kept for half a year. After the transfer, the original number list is also retained. Because the policies of different cities are different, you can also contact your home customer service.