'Great phone' is what I thought when i laid down hundreds of pounds to buy an S4. Around two months I'd had it. Yet last night, when I was out with some friends, the back seemed stupidly hot. I asked a few people if they thought it should get that hot. Worried, I took the battery out. It was SWELLING. My friend made the mistake of picking it up and it EXPLODED IN HIS HAND with a noise and cloud of smoke like a firework and left his hand SCORCHED. Don't risk your bodyparts for an S4. This should not happen.