F451 Error - Unable to link T-Mobile home internet phone number

I’m seeing a lot of complaints about this, which does not give me a good feeling about switching to T-Mobile. For people that are only Home Internet customers, not matter what we do, we can’t create an account. One method of creating an account says it doesn’t recognize the email address, but then if you create a forum account and try to link the phone number you are give with the Home Internet account, it give the Service Unavailable error. This is really bad and they will end up losing customers because of it. It’s insane to me that so many people have reported this over the last year or so, including some people making many calls to customer service, and they still haven’t fixed the problem.