I am currently on the grand fathered simple choice $20 unlimited plan. I called tmobile customer support to verify if I was eligible for the current promotion and they assured me I was. I was able to get my new iPhone 7 at the tmobile store but for some reason, the monthly payments on all the documents stated the normal amount (no mention of the billing credits). I traded in an iPhone 6 and I was also given a trade-in value of the iPhone, which went towards the tax of the iPhone 7 and still have a credit balance that will be applied to my monthly bill. Normally, I would wait it out a month and see if the credits are being applied but they are saying it will take 2-3 months for that to happen; I don't want to find out after 3 months that I won't be getting any credits. Anyone have similar experience regarding this promotion?