Excluded Devices

Hi, I guess that you need to play with the manifest.
This is the supports-screen link, wvga enters in android:normalScreens category, you should set this to false. I don't know how exactly this work, I have a Motorola Defy with wvga, and set this property to false and I can install it anyway.
In the compatible-screen page, says:

For example, if you want your application to be available only for large and xlarge screen devices, the <supports-screens> element allows you to declare that your application does not support small and normal screen sizes. External services (such as Google Play) will filter your application accordingly.

Click to expand...

So I guess that this for google play, but you can still install it if you have the apk file.

Though it's possible, as socialnetis described, why would you do this? You should be scaling your device based on dip, NOT px.

Dip doesn't work right for text- you can see the formula I used in this thread:
http://www.b4x.com/forum/test-my-app/28414-gameview.html

But all the stuff happening on the screen won't look right if even one of the resolutions is less than 480. See here:
http://www.b4x.com/forum/basic4android-share-your-creations/28925-afv-hail-gunfire.html

The screen panning is just too cramped on small screens.