Basic troubleshooting steps clearly outlined in the User Guide are restart, reset, restore from backup, restore as new device.
Have you tried ALL the troubleshooting steps? If you have and you're still having problems, then you'll need to bring your phone into Apple for evaluation and possible exchange.
No. Because why I need to do full restore and all other dancing if my iPhone worked well BEFORE but start to drain AFTER? If I had Samsung with Android, I would, but I think I have much more intelligent device.
Well, then go get a Samsung or Android. No one here really cares what you do. Meantime, if you want your phone to work again, you'll need to do the recommended troubleshooting steps. Or do nothing. Again, no one here really cares what you do.
here is a general description of the batteries. it is expected that sometimes the product will get warm, especially when charging. Another thing to look at is multi-tasking which could be the result of some battery drainage, bluetooth running in the backround, a high brightness setting, wi-fi ALWAYS enabled even when outside of a wi-fi zone especially because it will be constantly searching for networks. For information about multi-tasking, try this:
Worst comes to worst, try transfering all of your information to the computer, and try a restore as new, than transfer your information back to the iphone in the event it could be a software issue. here are some helpful articles to help you with this.
By following these articles in order, you will be able to save content to your computer from the iOS device.
-About authorizing and de-authorizing:
Prevent unprompted syncing of your iPod, iPhone, or iPad:
-iOS how to transfer or sync content to your computer:
Transfer purchases from your iPod, iphone, or iPad to an authorized computer:
iOS: Importing personal photos and videos from iOS devices to your computer:
Backing up, updating and restoring:
Downloading past purchases from the App Store, iBookstore, and iTunes store
this is definitely an ios 5.1.1 issue...happened to me on my old phone immediately after upgrading (iphone 4s) which the apple guy replaced...and is now happening on my brand new iphone 4s, which i set up as a new phone.
seems to have something to do with location services and/or exchange?