The Wall Street Journal is reporting that Apple is “looking into” the issues being experienced by some iPhone 3G users running iOS 4 on their device. Many symptoms experienced by affected users include: slower system responsiveness, battery draining, and overheating.
The most common criticism is that the phone is slow after an upgrade. There are also many complaints that the phone drains the battery quickly and becomes excessively hot. Concern about general problems such as slowness and battery life on gadgets isn’t unusual, but using iOS 4 on the iPhone 3G seems to make the problems so bad that the phone is nearly unusable for some people.
Of course, Apple has made it clear from an early stage that not all of iOS 4’s features are supported on iPhone 3G and second-gen iPod touches because of hardware restrictions, but many users appear to be experiencing unacceptable performance from their devices.
As John Gruber points out however, it appears that a DFU restore of your iPhone 3G goes a long way to relieve some of the issues.
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