I have an iPhone 4 and seems Verizon will be offering $200 for trade-in. With the Tmobile's trade in matching (+$50 towards to bill), I'm wondering if I can take advantage of this. 1. On 9/17, I trade in my iphone4 (worth $0 I think) and get iphone 6 at Tmobile. 2. Within 7 days, request a trade-in match. 3. Receive $200 (that Verizon would have offered) + $50. Does this sound good?