What should I do if I change my mobile phone number and can't receive the verification code?

This is an unlucky person. The original mobile phone number is useless and the verification code cannot be received. A day's work is finally done! I hope it will help everyone.

First of all, let me explain my situation. My old mobile phone number is no longer used. Even if you remember your account password (recorded with a note), you can't log in, as follows.

Then the new mobile phone number registered a new account.

Situation 1: If you don't need the original study record, you can re-certify, contact the customer service of massive open online courses (starting at 9: 00) to help cancel the original certification, re-certify the student number and name with a new account, and bind the school cloud; The customer service of massive open online courses is as follows