- Symbian is an OS that is no longer supported by Nokia. You won't get much help in updates and support with Nokia anymore as they are now Windows Phone partners
- Windows Phone is Microsoft Windows on the go. It can link up with Microsoft's cloud allows email calendar and the phone calling and links up with your windows 8 accounts @live.com. Even works with your Xbox 360.
- Android Google is an operating system that works for Google.com and you can do a lot of search engine related material on it which could be used on a Google phone or tablet or even what's called a chrome book. Plus a Google TV.
- iOS is Apple operating system which can be used on an iPhone iPad iPod touch IMac and an Apple TV. All of which is crossbreeding with the Apple network.