Nick from working with sprint and having their service for almost 2 years they aren’t bad at all as far as data services are concerned…many people don’t talk on the phone anymore and seeing that you don’t seem like the type to sit on the phone listening to others breathe(i hate when people do that) i’d say Mogul>iPhone…the iPhone seems to be a bit overrated IMO. Helio i know for a fact piggybacks on the sprint network so data speeds and availability will be better than other carriers such as AT&T, Verizon,and T-Mobile.