yes it is possible
Yes
yes. Thats what facetime is for.
No
yes all you need to use is FaceTime (built in) and its free on wifi
Yes you can you can use the inbuilt FaceTime program or you can download such apps like Skype.
If both phones can support Skype, which the iPhone does.
Yes. It has a front camera for FaceTime and you can download the Skype application
N, it is not possible to convert the iPhone 4s to a dual sim.
Yes you can. The iPhone 4S has an inbuilt video camera an you can choose to film your project in high definition.
Yes of course you can.
Like all mobile handsets they are only as good as the applications that you require them to do for you. So if you need diary management then the iPhone has an app for that. Need to make a call? iPhone 4S then the iPhone can do that. Need a mobile phone that talks to you only the iPhone 4S can do that!
The Verizon Iphone 4s has many different special features. The best feature it offers is a fast processor. Other great features are: HD video recording, retina display, 3G Wi-Fi hotspot, 5-megapixels camera with 5x digital zoom and the ability to video call.