My guess is alot of people on T-Mobile with JOD. It really is low risk for us. We pay nothing upfront and can easily switch when the time comes. It would be a bit of a harder pill to swallow on the regular jump plan as I was quoted $160 upfront because of taxes and something else, I forgot what all the fees were just know I wasn't paying them. Lol. The rep over the phone kept trying to push me to buy it on Jump 2 and I told him I wouldn't because I am not about to pay half the phone off in a month when the X comes out. Best thing about iPhones is the resell value I had the iPhone 7 plus 128 GB and was able to sell it on Craigslist for $625 in just a day and a half, I can't imagine any Android phone holding that much value.
I feel bad for the people that are doing the $300 trade in promotion. $300 in my case was less than half I got for the resell value. And really it would have only been $150 if you traded it in a year.