Apple iOS 4.2 vs iOS 4.3.1 | Compare iOS 4.2.1 vs iOS 4.3.1 Performance, Features , Functions and Compatibility iOS 4.2.1 and iOS 4.3.1 are the two versions that run on most Apple iDevices. iOS 4.3.1 is the first revision to iOS 4.3. iOS 4.3 as a very new release is used on all new […]