However this might be due more to the fact that iPhones are usually tied to the most expensive data plans rather than because of users consuming the most data on Apple’s devices.
“We think it has to do with their data plans and carriers, rather than their usage habits,” CIRP’s Michael Levin said. “They are all on expensive data plans, unlike Android users, some of which are on prepaid or unsubsidized plans with regional carriers.”
“Given the subsidies on iPhones, the carriers are working hard to make their money back during the course of the contract,” CIRP’s Josh Levitz explained. “With the exception of perhaps the hottest Android phones, we think the subsidies on Android phones are lower, so the carriers make more money even with slightly lower per subscriber revenue.”
source: CIRP via All Things D