Android 2.2 (Froyo)
Whereas Eclair could be argued as having basic, albeit important, features needed in a cheaper smart phones, Froyo improved on it with even more functions, new user features, developer features, API changes and bug fixes. Froyo brought a polished, more responsive experience with some serious under-the-hood improvements for users to enjoy, largely thanks to the optimized code compiler that provides a 2x-5x performance boost for CPU-heavy code.
