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3.1.3 Firmware is a battery killer - how do I back out this upgrade?

3073 Views 12 Replies Latest reply: Feb 21, 2010 1:52 PM by Tamara RSS
bbroders Calculating status...
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Feb 20, 2010 7:27 PM
While there is a lot of discussion on the "battery percentage" post about battery life, it is clear to me (and others) that this is a major problem with the 3.1.3 firmware and almost makes the phone unusable.

I have both an iPhone 3G and 3GS and after the "upgrade" to 3.1.3, the battery life has dropped to something like 4-5 hours even when in airplane mode and nothing running. I bought "System Activity Manager" and it shows that the system and user CPU usage jumping around, but typically around 5% (with peaks much higher) when I have it in this essentially no activity mode (airplane, all things off).

I would like to downgrade back to the previous firmware version, any way this can be done?
iPhone, iPhone OS 3.1.3


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