There are many operating systems available for mobiles but android is simply the best.
I am using android mobile since 2 years and I loved it. Its interface, features, connectivity etc are amazing. It is so easy to use.
Almost all the applications are avialable for android on play store while for windows these are very few. Android has revolutionised the mobile technology.
I am also impressed by its speed, it is really fast. Its developer google is also takes feedback from its users.
If any problem occurs most probably it will solve the problem or you can report it to makers and they will help solving it.
Most of the mobile users uses android and I am also one of them.
4 out of 5 stars.