Urgent, how can I find the past communication and SMS records of my mobile phone?

You can log on to China Mobile's website.

Conduct self-service inquiry

But you need your mobile phone password.

Usually six people.

Probably the last 6 digits of the mobile phone number.

You try.

But after filling it out, China Mobile will send a login password to the mobile phone.

You need to know the login password.

Which means you have the phone.