If you're unlucky, it'll suck. Mine's alright though. I can use for 4 hours plus, playing a few games, Whatsapp, web browsing, SMS and standby for 10+ hours with the battery life still more than half.

Really? My friends have no problems with their 4Ss too. Perhaps there's something wrong with that batch your friend got. I've been running it on iOS 5.0.1 since I got it so I don't know if there's any difference between iOS 5 and 5.0.1. But compared to my 3GS, the battery life on my 4S is substantially better.

Good point there. I'll check with my friend who has an iPhone 4 and see which is better. But I'm pretty much satisfied with the 4S.

@jiro1986, what you say make sense too. Even though I'm using some budget telco, its coverage is really good because it uses the infrastructure of a bigger telco. In fact, it's even better than my Digi line back home. Plus, I use wifi most of the time so it helps to conserve battery life too.

Yea it's possible. Check this article out and read some of the comments below: http://www.tuaw.com/2011/10/19/iphone-4s-u...h-display-tint/
Some people feel that the blueish/cool screens are the ones with problems.

Did you try that for your 4S? Any changes?

Mine seems more like the one in the middle so I think my 4S isn't affected by it. Compared to my 3GS, it's significantly warmer. But to be honest, the warm screen is more pleasing to the eye than the cool blueish one on my 3GS.

Maybe you should return it and get a new one. I only charge my phone every 1.5-2 days. I play games (non-3d ones), facebook, whatsapp, web browsing and calls and SMS. There's either a problem with your phone battery or 3G is the issue. I turn my cellular data off most of the time. What iOS are you on? 5 or 5.0.1?