It's not much of a secret that Android's success is in no small part due to the broad range of devices which are currently available on the market. There is a phone for everyone available if you look hard enough, from top-of-the-range choices such as the Samsung Galaxy S II all the way down to cheap, unbranded phones from China.

For those on a budget this choice can only be a good thing, but for carriers, it turns out that the cheaper devices may actually do more harm than good.