Some days ago my S 3 would get warm, almost hot. Lately, it is warm but does not seem near as warm or hot as some days ago. I think it was getting warmer/hot when it had Android 3.xxxx. about two weeks ago 4.0.4 (Jellybean) was installed automatically. Not sure if the upgrade had anything to do with the cooler device. I had not owned my S III long enough to be able to compare 3.0 with 4.0. I am happy with the S 3 in general. I add, my prior smartphone was not an Android so I have no field of reference.