I think I've tried it all already. I'm calling Apple tomorrow morning to see if they'll replace my phone. :-/
I was having bad battery usage and standby yesterday. Literally dead by 4pm where my iphone4 would only be at 50%. Last night I erased all content and setting and did a fresh restore and set up as new phone. The first thing I did was delete iCloud all together. Unplugged phone this morning at 7am and as of now I have 7.5 hrs standby and 1.5 hrs usage and I'm at 92% still. Could it be iCloud?
I didn't turn anything else off and am waiting for the 24 hour mark so I can check my location services and especially system services to see if anything has bee used.
Facts need to be analyzed because not everyone is having battery problems. That's why people are trying to figure out what might be causing it. It's pretty obvious that it's not an issue for everyone, so we need to look at what the differences are in people's phone setups, etc. and see what the problem might be.
Some people think it might be an issue with the new antenna. Could be that it's causing people's phones to constantly switching between antennas and searching for the best signal. I'd say that's a possibility, since turning things on/off only seems to help a small portion of the people having problems. It may have to do with the location you're in and what the phone is doing to get a signal. It's just a guess, but it's as good as any others I've heard.
I'm using iCloud. I have two exchange accounts setup to push email. Gmail and work, so I'm getting a lot of emails from work. I have wifi, bt, and just about all location services on except for time zone.
So far, 3 hrs and 40 min ago since my last full charge and it's down to 88%. And that's with using it for fb, instagram, texting, etc too.
No complaints here.
Same here.. Go to sleep with 90 %.. Siri, bluetooth gps off.
in the morning - phone dead, alarm didnt even go off.