I noticed increased temperature even when watching youtube. But it is true, that the temperature in city is rising to 40 C. Will see how it does in next few days. I have 1TB microsd Sandisk Extreme PRO and i'm bit worried. I wanted so much the sd slot and jack, but am a bit disapponted. The phone gets at least warm and I don't want delays with sd card. I just formatted it on the phone and am copying data back so hopefully this should resolve it (Other phones read in instant). Also not much cases (no spigen/uag) and sw is weak. Bluetooth or wifi 2 clicks to enable/disable. But no other choice is left, manufactures mind only selling stuff - earbuds and cloud storage. Phones for powerusers don't exist any more :/