Android phones are equipped with rich interface. But one thing that I noticed, is Android is rich in File Management. What I means to say like operating system you have an explorer type on in your phone to see the list of files. You can move, copy or send files via Bluetooth. Compared to Android before Windows phone and Symbian was the only platform that was rich in this features. I still remember in Nokia 6600 as one of the best phone that was having very easy file manager. You can move files, change file extension so that it be played in video player. etc. As the operating system started getting more richer with more benefits, it has increase the need of File Manager. What I want to ask that do you really agree, whether all phones should have a file manager. Compare to Android, I think iPhone will never need. If everything is well organized it is not necessary for you get confused between set of files. The same also matters when you are planing to learn development on a mobile platform. Android has Linux base which makes it more simpler to understand while iPhone is entirely different and OS like Symbian are out of market. In my views it is not possible to bring all the mobile phones on one single platform.