New Smartphone/Dinc2 owner. I got this phone a week ago and I am absolutely thrilled with it and I want to do everything I can to treat it as it should be treated. My concern is with heat with a case installed. Phones naturally get 'hot' with use but if I am using the Navigation app or playing a game I know that the heat is not dissipated as readily as with a 'naked' phone. Are my concerns warranted?