After I have upgraded my Iphone to 3.0, the battery seems to be draining at super scary speed. I mean, only last 4-5 hours max for a full charge instead of at least a day and a half with the previous 2.0. As usual, I think I have found the solution for you folks. I did it and it worked!!!! It took me a while to research plus trial and error but this one should do it. If not, you can let me know. Oh, and for people out there that suggest turn off Push, 3G, wifi, Safari and etc. Why don’t you just turn off your phone? Obviously something is wrong with the OS after your upgrade. I found this thread on Apple support forum. Here are the 4 steps to the happy Iphone.
NOTE: VERY IMPORTANT
You need to back up data that are important to you somewhere else first, (I’m not talking about Itunes backup your Iphone here) There are some Iphone file extractor out there that will do this. In my case, I learned the hard way. I lost all the photos that I took with my Iphone. They are not that important but I thought I should warn you before making all these steps below. These steps basically wipe your phone clean. Again, if you value your data, please make sure you back them up. Contacts, Musics, Photos (from Iphoto – not those that you took with your Iphone), calendar can be sync back from your computer.
- On your Iphone. you need to reset all the settings. Here is how; iPhone > General > Scroll down to “Reset” and the select the top option to “Reset All Settings” This will reset the settings and reboot.
- Go into your iTunes folder – Home > Library > iTunes > iPhone Software Updates. and delete the 3.0 Firm Ware from the list.
- Plug your Iphone and connect to Itunes. Click RESTORE and download a FRESH copy of 3.0 software. (When I did mine, it automatically prompt me to download the 3.0 software)
- Once download complete and your phone get reboot, DO NOT restore from backup. Set up as a new phone and sync your data manually.
Sounds like a pain? I will let you decide. I rather go through this once and have my happy phone back than go to Apple store and have them do the same thing. My understanding is, this issue doesn’t happen to everybody. But it sure effects quite a lot of people. Hope this helps.