Incredibly poor iPhone 5 battery life whenever 3G is activated, why?

What I don't get is why it's hot if it's not sending data and the CPU isn't being used. Heat should = work.

No I don't want to turn all that stuff off, that defeats the prupose of having an iphone. But I don't have problems (or at least not as much) with those things on with WiFi only.

My final conclusion is that it is 90% due to cellular data, turn it off and that corrects most of it, however I think there are also some background process issues. The first run through with no cellular data I got OK battery life but not super and I think some of what was classified as "usage" should have been "standby". Today I'm great, as advertised battery life but it's been mostly standby. When I started web browsing and things like that I feel it still drops a little on the fast side but not nearly as bad.

So there most certainly is a huge gaping bug with cellular data and then possibly some loose canon processes that get stuck running in the background. Again though, the weird thing is I can't find excessive data or CPU usage when running programs to monitor it.

Now i'm @ 77% 2 hours 24 minutes usage, 17 hours, 5 minutes standby.

Yesterday I got around 20 hours standby and 9 hours usage but I didn't actually use it 9 hours.

Definitely seems to be mostly or entirely cellular data. The first time I tried this battery life was "OK" but this is pretty steller. Yesterday I didn't do so much browsing and email and stuff but today I did alot. Still going. Just shy of two days. This is the battery life we need and expect out of our phones!

Well my good fortune ended today. Battery drain is back even WITHOUT data. I lost 10% on the bus this morning just reading stuff that was already downloaded - no data use at all not even WiFi. Lost 5% while I was sleeping for 6 hours. I'm now down to 81% and it's still morning. All I did was read stuff offline and have a 5 minute phone call.

In the never ending bad battery saga I've noticed that my phone stopped auto locking itself regardless of WiFi or cellular connection. What ****.

FYI there is _NO_ fix for this. This is either a hardware problem with select phones or some very serious bug deeply ingrained in the iOS 6.0 & 6.0.1 operating system. I have used my phone on various 3G networks in six different countries now. I exchanged the phone once and I have done a DFU restore and tried the phone wiht no apps and iCloud disabled. The horendous battery drain is the same every time always no matter what if cellular data is turned on. Turrn cellular data off and battery life is fine. Apple has really screwed their customers on this one.

And 6.0.2 does nothing to solve the problem...