Original iPhone 3.0 upgrade - No battery life and running warm to hot

Same problem here.
I deactivated the Push mail and Wifi and that seems to have gotten rid of the overheating and the super fast discharge of the battery.
I tried turning just the push mail on, but it looked as if the battery again started to discharge very fast.
Tonight I'll try to wipe it (backup) and do a full restore. See if that clears up any old 2.1.1 code that might interfear with the 3.0 update.

Looks like it's definately the push and/or wifi 😟

I upgraded my 3G to 3.0 yesterday, and am experiencing the exact same issue -- the rear of the phone heats up tremendously, the battery runs out in like 3 hours (even though the phone is off and I'm not even using it), and now it won't charge from the USB sync cable plugged directly into my Mac. They better figure out this one soon, as my phone is pretty much useless without any significant battery life. I use this phone for work, so this is pretty unacceptable.

(BTW, there were also major quality issues with the initial release of the 2.0 software update last year, so I'm not surprised that such a major issue yet again slipped through Apple quality assurance. Typical.)

Same here.

Three iPhones 3G upgraded to 3.0, warm and VERY short battery life.

Waiting for 3.0.1...

I had the same issues with my iPhone (original, only 1 1/2 years old) running warm and the battery discharging quicker then normal after updating to 3.0. On top of that, it kept telling me that I did not have a cellular data plan whenever I tried to access the Edge network. I turned it off and on, rebooted it, turned airport mode on and off, finally after taking out the sim card and then reinstalling it I was able to access the Edge network without the message. It ran sluggish at first, slower then usual, but has started to run at more normal speeds. I did recharge it on the cradle after all this and am playing with it some more now. Since then it has not run as warm as it was after the update and the battery seems to be operating more like normal. I have played with many setting, such as location settings and wifi and such, but not the push settings.

I updated mine last night, played with it after it finished, and today I still have a full charge. I'm not running 'push', but I check email, chat on facebook, check weather radar, etc. all over Edge and no problems with battery life or heating up.

I will add that I exchanged my iPhone a couple months ago (under extended warranty) due to a volume button sticking. I think this was a refurb first gen. But, I am not having any issues after the 3.0 upgrade.

By the time Apple release 3.1.... our batteries will be dead, long gone.

not using iphone until the update comes up or i find a workaround to the heating problem (hoping i dont have to restrict myself using it in cool places lol..... oh well back to my old fashoned sharp phone -_-....

oh dear.. or Apple, grant us with free 3G upgrates :eek:

I had the same issue, but noticed it before the phone heated & drained the battery (my PC speakers are nasty unshielded, so I could hear the phone constantly communicating as soon as the 3.0 update completed). I have a Microsoft Exchange mail account; its push was constantly running. (I tested by putting my phone by the speakers so I could hear the GSM transmissions.) Deleting & recreating the mail account did not help. I fixed it by changing the ActiveSync settings on the mail account on the phone from Use SSL: On to Off - I could hear it transmit once and it went silent. I switched Use SLL back to On, it stayed OK. (Whatever couldn't get through while SSL was on got through OK.)

Same situation here. Original iPhone.

Disabling WiFi fixed it for me. Case is cool again, battery consumption is back to where it was. I had tried changing all the email push settings, etc., with no effect. Just turning off WiFi did it.

Having this happen and Mail crash upon checking for new mail on my work account (each time, so I cant use that account) has somewhat reduced the luster of this upgrade.

Having this happen and Mail crash upon checking for new mail on my work account (each time, so I cant use that account) has somewhat reduced the luster of this upgrade.

THAT I fixed by deleting & recreating my mail accounts (maybe only needed to delete the offending IMAP account, but I deleted every account, including an old unused account which I didn't recreate.)

I don't know what happened, by my iPhone seemed to magically fix itself AFTER I charged it to 75% in the car.

I don't know why, but it's suddenly nice and cool again, everything is on - wifi, 3G, Push, Location Services and Bluetooth, and it seems to be running really well now. Even tethering doesn't heat it up.

I don't think Apple are capable of magic fixes over the GSM networks, but something happened and now it's working better than ever.