If you've ever thought about buying an iPhone, you have probably noticed the price tag. The older iPhone 3G costs $99 with a two-year commitment and performs sluggishly with the latest OS updates when compared to the 3GS (which will run you a whopping $199 with two-year agreement). Because Android is an open source platform, it is very cost effective to implement which means savings for the end user. Every major cellular carrier (except for AT&T) has at least one Android phone available free with two-year agreement. Of course these are lower end Android devices, but they are still comparable in performance to the iPhone 3GS. The most expensive Android phones (which significantly outperform the iPhone 3GS) are $199 with two-year contract.