UGH I signed up a few weeks ago for JOD! (new customer), 1 64GB 6 and 1 64GB 6+, traded in 2 smartphones AND paid $200 - so our phones are supposed to be $15 and $19. Then when I went to pre-order they VOLUNTARILY upgraded both to 128GB and said over and over "you will still pay $15 and $19 per month and no money down".
Don't make me jump through hoops T-Mobile - please.
You will only pay 15 or 19 per month (for the phone) with no money down. However you will most like also pay:
Phone - 15 to 19
Upgrade to 128gb - 199 over 18 months or $11 per month
Tax - A couple dollars per month.
Credit wont be on EIP - $12 month
So your charges will likely be (lets say 6s plus 128gb):
19+11+2+12 = $44 (you will get credited $12/month on your bill) so you will pay $32/month.