Can I check the previous information content through the public security system after the phone number is cancelled?

Information content and call content? This can be quite difficult. There are hundreds of millions of users in the country, and it is estimated that there is not so much information. The content of the short message is only kept in the operator's server for 72 hours. Unless the landlord is targeted by the public security organ early and listens to your phone and information, it can't be found, but the information and call records can be found (that is, a detailed list of when you contacted this number).