Initiate DFU mode on your phone and restore the phone. Be sure to set up as "new phone" when you sync your data back unto the phone. Prior to the growing numbers of users experiencing lack luster standby or usage reports, I was sure that I had a physical issue with my 3G. Since the process that i have described above I now have much better battery life. Please reply back either way if your finding differ than mine.
Had to laugh when I saw thisWHEN IS BATTERY TECHNOLOGY GOING TO ADVANCE!
My wife has the 3GS, and I have the regular 3G phone. While she has had no problems with her phone, my battery problems started since I upgraded to 3.1. It didn't occur to me that the 3.1 update was the problem. I just thought my phone was going bonkers.
Here is what happens: with full power, it shuts down randomly. Then I have to do the two-button start thing to get it running. Then the black screen with the apple symbol comes on. Then it takes about 3 or 4 minutes to boot. Then the battery is dead. Then I plug it in to recharge it. Then within a few moments, it shows, like, half the battery power is restored.
This is happening 4 or 5 times a day. It's absurd.
EDIT: My wife and I haven't jailbroken or enabled our phones for tethering.
I guess I'm just lucky. I saw my battery life go from 4 1/2 hours > 6 hours. I feel like I can use my phone all day now. When I went to 3.1, I set my phone "as new", there might be issues when people upgrade, who knows.
Can anyone tell me where I can get this battery logger app? My 3G just quit one me with 100% (yeah right) battery life. I was already wondering why it held on for so long...
Thanks..