Hi. I would like to know your opinions about which case I should buy. AFAIK, silicon, fabric (not sure about this one) and plastic are the best materials to keep the heat away. But in reality, are these materials make an actual difference? I would go for aluminum but it has issues with blocking antenna signals. Which case you would recommend to me? It really doesn't matter if it protects the phone or not. I only care about the overheating. Also please do not suggest something big. The S5 is big enough already. Thanks.