Yes, I know you think getting a new number and port swapping makes his current PTN a "new number". Sprint does not see it that way unless that number has been disassociated with Sprint for 45 days
That's what I thought. You apparently have reading comprehension issues.
Let me spell this out so you can understand it.
The tmobile number used to create the account is not a number ever associated with, and has never been used on Sprint before.
Once you activate a TMobile SIM (not porting in), Tmobile, just like Sprint, gives you a number from their pool. This would be the number used by OP to create the free 1 yr account.
Are we on the same page now?