This selected applications are used by many people that even celebrities also use it.
However, only the selected mobile was allowed to use the application such as Iphone/Ipad, Android, Blackberry and Windows Phone.
If used in mobile other than all of the above, it is likely this application does not function.
If you want to use the listed application, there is a requirement on your mobile internet connection and those type of mobile.
So you can immediately share some hot news and gossiping about what you have seen a few minutes ago with your friends on Twitter.
Easy isn't it?
#available for Iphone, Ipod Touch and Ipad
#available for Android, Blackberry, Iphone/Ipad, Bada and Windows Phone
#available for Android, Iphone and Windows Phone
p/s : Be careful in the selection of your application, because the risks for being hacked easier.