You're making mistake on your android manifest:
- Your android min version is set to 7, but Initial support for tablets was added in Android 3.0 (API level 11). So it must be 11 or higher.
- Under uses-feature and uses-permission, you're requiring some hardware features that maybe not available on some tablet like front camera or telephony. For all this kind of features, you should add a new parameter
android:required="false"
Here is the soure with more details from android developper website.
http://developer.android.com/distribute/googleplay/quality/tablet.html#android-versions http://developer.android.com/distribute/googleplay/quality/tablet.html#hardware-requirements