1. iOS/ iPhone
1.1. Pros:
1.1.1. Easy to use and work with
1.1.2. best-integrated marriage of hardware and software
1.2. Cons:
1.2.1. Can be hard to use at times because if you have to much memory used up on the phone
1.2.2. Sceens break easily if dropped
1.3. http://www.computerworld.com/s/article/9214206/Smartphone_OS_shootout_Android_vs._iOS_vs._Windows_Phone_
2. Android
2.1. Pros:
2.1.1. features app icons front and center
2.1.2. The home screen is simple and stripped down -- all the app icons can be moved or deleted
2.2. Cons:
2.2.1. there are inconsistencies in the way Android performs familiar tasks
2.2.2. Freezes alot and if screen gets wet at all it will not work
2.3. http://www.computerworld.com/s/article/9214206/Smartphone_OS_shootout_Android_vs._iOS_vs._Windows_Phone_
3. Windows 7 Mobile
3.1. Pros:
3.1.1. Windows Phone 7 is organized around a series of hubs -- displayed as tiles -- that deliver information to you or let you perform certain tasks.
3.1.2. they deliver useful information at a glance, without having to run the underlying app
3.2. Cons:
3.2.1. In some instances, the tiles are little more than big buttons that, when tapped, launch standard apps for, say, e-mail.
3.2.2. you get only two screens -- not seven, as you do with Android