-iPhone: is the smartphone developed by Apple. It is the pointing device in the market of smartphones which has millions of followers around the world.
Android: They are the Smartphones developed by companies other than Apple.
-Blackberry: they are the old PDAs or small computers designed especially for business people who want to access the themes of work from the mobile. Today, teens will have "taken over" the use of the Blackberry.
Microsoft phone :In February 2010, Microsoft unveiled Windows Phone 7 with a User Interface inspired by Microsoft's "Metro Design Language", to replace Windows Mobile. Windows Phone 7 integrates with Microsoft services such as Microsoft SkyDrive, Office, Xbox and Bing, as well as non-Microsoft services such as Facebook, Twitter and Google accounts. This software platform runs the Microsoft Mobile smartphones, and has received some positive reception from the technology press and been praised for its uniqueness and differenttation