Can a phone number or email address be disassociated from the HUAWEI ID account？

Only the Email address can be disassociated / unlinked from the HUAWEI ID account. The phone number can be changed but not unlinked.

You can visit the account center, touch Account and security, and then touch Email to disassociate the HUAWEI ID from your email address. After the verification is successful, the disassociation is complete.