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

Only the Email address can be disassociated / unlinked from HUAWEI ID . 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.