Just got the Lumia 920 last week and i'm loving it. However I noticed while talking on the phone for just 10 -15 mins the phone's earpiece gets really hot (Phone is on the AT&T LTE) . I had the Lumia 900 before this and never had an issue like this. I have shut off location services and reboot my phone. Is this normal? I sure hope not =(
It may get warm but should never get hot. I suggest getting it checked out at your local Nokia Care Point if it happens again. You can locate your nearest care point using the link below.
I just bought my Lumia 920 two days ago and have noticed that too. I was browsing features for about 10 mins and then I got a call - The hear piece area was way warm than normal. And, the temperatures outside were 10F. I probably would have felt it on a fine summer day for sure.