When I charged fully my 6s+ (iOs 11.0.3), I just have used it for 30 mins. And, I realized it suddenly overheat (I think it got 40 - 45 Celsius). After that, I turned off wifi connect, took off my case, and it's ok after 15 mins. I'm really worry, who's have experience with that? Just give me some advice for this situation, thanks so much.