Yeah I don't think the reception is the hottest. It works okay for me, but ironically it will consistently drop calls in our bathroom (granted, tough area for signal) but we DO have a Network Extender here. It seems like it will have strong signal then lose the connection with the extender and try to hit the towers, fail, and drop the call.
Of course, I literally have to drive a couple hundred yards away to activate a phone because it will somehow hang onto the extender for a ridiculous distance away outside.