According to the latest research from the Consumer Intelligence Research Partners, 59% of iPhone users spend over $100 a month on their wireless bills. This is the biggest percentage of any other group of smartphone users.

Windows Phone users' bills are nearly as much, but 56% of Windows Phoners (is that a thing? well, it is now) spend more than $100 per month. Android numbers see 53% of users spending more than $100 per month. This brings us to BlackBerry - and not RIM, remember? - who have the lowest average monthly smartphone bill, where just 40% spend more than $100 per month, and 10% spend under $25 per month.