I am new in android world. When I create a project while setting Target = Android 2.3.3 - API Level 10 in my AVD setting, I get following skin options.

But when I set Target = Android 3.1 - API Level 12 (which is the latest available) in AVD settings I only get this which is basically tablet version of emulator.

My question: Does Android 3.1 only supports tablets? (I think answer is Noo)
If No, how can I use API 3.1 with phone version of emulator rather than tablet emulator?
If Yes, can anyone point me to any official statement regarding it?
I have installed the latest android SDK, Eclipse Classic with ADT.
May be setting the Skin -> Resolution will work but is it the only way?
Check out the docs on screen sizes so you can see the difference.
http://developer.android.com/guide/practices/screens_support.html