Restore the whole iPhone using stock Apple software. If your battery keeps on doing the same thing, then take it to Apple; it's a hardware defect.yes i set it up as a new phone. Ive read around the net and there are alot of complaints about battery life in 3.1.2. i guess i'll just have to wait for an update.
Call Apple Care, they will set up a case for you. They will tell you to do what we already told you. Tell respectfully that you already did everything on the Apple support documents on the Apple Support Website and that the final advice from Apple.com was calling Apple Care (that will take care of many unneeded time spending and will speed things up with your replacement).I did a restore using the stock Apple firmware and still have battery issues. I suspect there may be a problem with my battery
Unfortunately there is not Apple store where i live the closest one is 2 hours away. I purchased my phone thru AT&T will they help me or send me to Apple?