Safety Hazard?

[Irock619]

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)

I noticed this morning that my phone was hot after charging over night. I normally charge over night and haven't noticed this before. I can feel the heat through my otter box defender case. Should I be worried or will this be fixed with the software update? I feel like this is a safety issue with this phone because of all the complaints about the battery and heat.

 

[drewsof07]

The iPhone is designed to shut off if it goes above preset "safe" operating temperatures. Thick cases tend to hold heat, further exacerbating the problem (like your otterbox). My iPhone 4 has been running a little warmer since iOS 5, but not to the point it is uncomfortable to hold. I only use a bumper...
If you reach the unsafe temperature internally, it will look like this:

 

[Irock619]

The iPhone is designed to shut off if it goes above preset "safe" operating temperatures. Thick cases tend to hold heat, further exacerbating the problem (like your otterbox). My iPhone 4 has been running a little warmer since iOS 5, but not to the point it is uncomfortable to hold. I only use a bumper...
If you reach the unsafe temperature internally, it will look like this:

Image

Thanks! I guess until I see that message then the phone is not too hot and is not a safety hazard.