How does Huawei p40pro view the mobile phone registration software?

This has nothing to do with the mobile phone model, but is essentially registered with the mobile phone number. Tencent provides QQ footprint for users to query what software QQ is bound to log in, while mobile phone number operators do not provide this. Registration only depends on SMS verification, so if all the verified SMS messages are saved (now mainstream mobile phones have enabled SMS automatic backup by default, and the cloud has theoretically backed up a complete SMS record), you can count which software is registered next to the SMS.

As shown in the figure below, entering "Verify" in the search field at the top of the SMS interface will list all registered SMS messages.

This has nothing to do with the mobile phone model, but is essentially registered with the mobile phone number. Tencent provides QQ footprint for users to query what software QQ is bound to log in, while mobile phone number operators do not provide this. Registration only depends on SMS verification, so if all the verified SMS messages are saved (now mainstream mobile phones have enabled SMS automatic backup by default, and the cloud has theoretically backed up a complete SMS record), you can count which software is registered next to the SMS.