Ok I have one more permutation to add into the mix. Having talked to 4 T-mobile customer reps (2 on the phone and 2 in-store), I am still no closer to the answer. Here are my details:
Current phone: iPhone 6, 128 GB with AT&T. Current retail price on gazelle: $371
Desired phone: iPhone 6s, 128 GB with T-mobile. Full retail price on apple.com: $849
Would like to own iPhone 6s outright at the end of the deal
According to the details on the t-mobile website:
http://newsroom.t-mobile.com/news/iphone-6s-offer.htm
Upfront fee: $200 (actually $199.99, but lets keep the math simple)
Monthly fee with JUMP: $3/month for 18 months = $54 total
Hence total device cost I would have paid over 18 months = $200 + $54 = $254 (this excludes the cost of the plan itself)
According to this quote on the T-mobile website, if I want to own the phone outright, I should end up paying $125 lesser in total compared to the total price of the phone:
Hence, the buyout I should have to pay at the end of the 18 month period is:
$849 - $125 - price of my trade-in - what I have already paid over the 18 month period
= $849 - $125 - $371 - $254
= $99
No single T-mobile rep I have talked to can confirm this. The numbers for the final buyout I have heard are either $164 or $200.
If I pay a buyout of $164, the total amount I am paying for the phone is:
$371 + $254 + $164 = $789. This is $60 cheaper than the full $849 price, not the promised $125
If I pay a buyout $200, the total amount I am paying for the phone is:
$371 + $254 + $200 = $825. This is $24 cheaper than the full $849 price, not the promised $125
Anybody here think my math is off?