Want to change the mobile phone number, but it shows the new number has been registered?

Hello, if the mobile phone prompt has been registered, it means that this mobile phone has already registered in DingTalk. If you need to bind your current DingTalk account, you must first delete the original DingTalk account and then re-bind your current account.

Guess you want to learn more about:
How to delete DingTalk account?

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