I did this deal back in March and while I had an issue with the rebate (they said I was not on a qualifying rate plan although I’m sure I was,) Tmobile support credited me the $300 rebate anyway. Tmobile is offering a $300 Mastercard rebate and stack it with the Capital One $250 portal rebate. You’ll have to pay about $150-$200 in monthly fees, so time it right to where you cancel as soon as you get the MC and portal payout.
