My sister wants to get the iPhone 6 since she does lots of businesses on her phone and was looking for a bigger screen phone. Her service provider is AT&T and they had recently stop their contract program on June 1st. To get the iPhone 6, it will now cost her $700. You all know that Verizon, Sprint, T-mobile and AT&T all have this phone, but now with T-mobile and AT&T no longer offer contract for a discount phone, which service provider is best to go with? Who has experiences with Verizon, and who has experiences with Sprint? She is willing to switch provider to get the discount price for the iPhone 6.