I currently have an EIP along with an S9 promotion on my line, and I'm trying to transfer my line to a Tmobile-One account. I'm trying to make sure that it's possible for the s9 promotional credit to get transferred as well. I spoke with someone via chat, and I was told it was not possible at all, but I had spoken to a previous tmobile person via chat previously, and I was told that it was possible. This was the reason why I went ahead and got my s9; but now I'm getting a different answer.
Can I confirm if this is possible or not? I made a decision based on the information I was given, and now I'm being told the complete opposite.
I would suggest reaching out to T-Force so they can take a look at your options, and what is possible or not. We don't have account access here through the forums, but they will be able to research your account through FB or Twitter! You can find links to them in my signature!