run app only on phone ,not on Tab

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http://androidforums.com – Hi, I have developed one android app.I want to setup this application for running only on phone ,not on android tab.I have made changes in the manifest file as follows- <supports-screens android:anyDensity="true" android:largeScreens="false" android:normalScreens="true" android:smallScreens="true" android:xlargeScreens="false" /> But it doesn't work. So please tell what is the solution to run app only on phone? (General)