The heatsink is built into the aluminum body of the phone, so the whole device is a heatsink for the phone. That should help alot with gaming and VR. Though I wonder if cooling the SOC will come at the expense of burning your hands?![]()
That's what Samsung does, the interior metal plate is also the heatsink which heats up the edge of the phone all around to exhaust the heat outside of the phone. If you have a case which protects the edge of the phone it also limits the effectiveness of that type of heatsink to get rid of the heat and cause the phone to warm up.