iOS4 Causing Older Iphone Batteries to Run Out Quickly
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Apple seems to have gone terribly wrong with something. With the new iOS4 launch , it has started facing trouble in all it iphones. Older iphone’s are now having problem of battery drainage after installing ios4 firmware.
** Tip : How to Downgrade to lower firmware

Battery draining on older iPhone models like 3GS and 3G makes sense, as they do multi-tasking, but on the other hand iPhone 2G does not multitask, or even change its background, still gets poor battery life after the upgrade.
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Actually, the original iPhone doesn’t support iOS 4 at all. Only iPhone 3G and up are supported. The 3G is the one that doesn’t support multitasking or home screen background. Only the 3GS and iPhone 4 support all iOS 4 features.
Great website anyway, by the way
Thanks for your comment Karel. Keep Visiting
If you do a “factory reset” (which leaves all data and programs intact) you will experience longer battery life.
Yes , thats true. It will revert it back to older firmware i think. But multi tasking is a power consuming feature in iteself
It’s funny that Steve Jobs offer a free case for buyers. A new case can solver iPhone 4 antena problem?
Fascinating & tidy looking website, I’ll post it on redit n see what people have to say..!
I had a 3G about 2 years old and battery life had become dire. I am running 3G with OS4 and it runs great and for a long time. The secret? I put in a new battery afterall it is now 2 years old. 3G does not support multitasking
its not so hard to stop this, remmember to close all applications running on multitask function before u sleep set to airplane mode and it will only loose 1-5% at night i had problems with this before..