Hello, one DingTalk account can only be bound to one mobile phone number. If you changed your mobile phone number, please change the it in DingTalk in time:

DingTalk Mobile app: [Me]-[Settings]-[Account and Security]-[Change Phone Number], you can bind the new phone number after entering the login password.

Tips:

1. At present, the replacement of the mobile phone number can only be performed on the mobile phone side;

2. If the password is forgotten, you can use the SMS verification code to reset the password and then modify it. If the old number is not available, you are advised to abandon the account;

3. If the mobile phone is lost, you need to log in and replace the mobile phone number on the new device. If you log in to the new device, you will need the SMS verification code. If the old mobile phone number cannot be used, you cannot log in and successfully modify the mobile phone number. It is recommended that you abandon the account. Re-register with your new phone.