Please note that the tablet can slip and fall on the sides

I'm really, but then really disappointed because the name said "case for 7-inch tablets." The keyboard works perfectly with my Nexus 7 32 GB 1st generation but not with the Galaxy Tab 3.0.7 of my mom. But this is not the most disconcerting because it is registered to download an application (physical qwerty keyboard) to allow connectivity. I did this for the Galaxy Tab but nothing to do, it does not work (not compatible because I think). Next to this, the tablet fits in the cover can therefore fall by the lateral sides. So what is this house that it protects nothing? I received it today and I return it as soon as possible, that's for sure!