Wirelessly posted (Mozilla/5.0 (iPhone; CPU iPhone OS 5_0 like Mac OS X) AppleWebKit/534.46 (KHTML, like Gecko) Version/5.1 Mobile/9A334 Safari/7534.48.3) Is it possible that CDMA increasing the heat of the iPhone? My dad has a 4 on Verizon and it can get pretty warm. Now I'm finding my Sprint 4S to be getting quite warm, almost hot. All I'm doing is listening to music and surfing the web. My 4 on AT&T never got warm.