How does China Unicom clean up expired information?

The phone is turned off, and it will be saved for 24 hours from the successful sending of the short message from the other party. If the phone is not turned on in time within 24 hours, the mobile phone will not receive this message.

You can view the detailed list of SMS and MMS messages in the last six months (including the current month) through the following channels:

[1] Log in to the online business hall, and click phone bill query > bill query > detailed query > SMS details.

[2] after logging in to the mobile phone business hall client, click "service" > "inquiry" > "other business inquiry" > "SMS and MMS details".

Because the content of the short message involves personal privacy, the system has no right to inquire; If the mobile phone keeps the record of sending short messages, you can query the content of short messages directly on the mobile phone. Generally speaking, according to the settings of the mobile phone, as long as the SMS record on the mobile phone is not deleted, the SMS sent and received will not expire.

In addition to the above methods, you can also go directly to the local business hall to inquire about the detailed list of SMS and MMS messages in the last six months (including the current month).