Hi,
Im a long time lurker to this forum but this is my first post.
Thought I'd post my recent findings with my iPhone 4s.
I got my 4S on launch day and straight away, noticed the below average battery life. I was getting around 20H per charge. I was really surprised at this as IOS 5 on my iPhone 4 increased battery life!!
Like many others, I thought it was a software bug and that Apple would patch it. So when 5.0.1 was released, I upgraded straight away. Again, the battery life was poor. One thing I was noticing was that usage was almost half of standby times. Ive never paid much attention to usage and standby times, but when my phone is telling me it had been getting used for 2.5 Hrs when it was sat on my desk during a 5 hour shift not being touched, I knew something wasn't right!
On top of the battery issues, I was also getting lost network connectivity or a "No Sim" message.
So I decided to contact Apple. I was taken through the steps of setting up the phone as new but this made no difference So I decided to take the phone into a 'Genius'.
My nearest store is over an hour away so I unplugged my phone and set off. My appointment was in the afternoon so I spent a couple of hours wandering round the shops.
At my appointment, the genius hooked my phone up to the store wifi then accessed a config menu via an iPad (Very Cool!). He told me my battery was healthy and there were no network issues registering!
I pointed out my usage stats to him and he said that seemed fair enough to him!
I then pointed out that 4 hrs Standby with 2 hours usage was impossible for me on that day, which he agreed! He then agreed to swap out my phone.
The phone I received was still running IOS 5.0. I set it up in store from my iCloud backup and left.
I charged my phone that night (Wednesday) and haven't charged it since!
I am now sitting with 44% battery, 2hours 28 minutes and 1 Day 15 Hours standby and it hasn't been plugged in!!!!!!
So far I have only used stock apps such as safari, calculator, phone, messaging emails and twitter but have everything turned on.
I read a post on the apple support communities suggesting the issue is with the GPU driver so I am going to start using other apps over the coming days to see if, as suggested, apps such as Facebook use the new API's. Once Iv'e carried out these test, I may considering updating my phone to 5.0.1
Ill keep you updated and would be interested to see if anyone else has had similar experiences.