Wait for the Jailbreak to release la.. few more days only.hehehe

I discovered this on my iphone 5.. Battery life improve tremendously compare to IOS6.0.1. I am coming from iphone4 user to iphone 5. So, when i got iphone5 i will RESTORE from iphone4 to 5.

Now in IOS 6.1 i do this
1.) I do a fresh installation of IOS 6.1 & with jailbreak.
2.) This time i did not RESTORE my backup and setup a new.. Since i use icloud, all my contact remaind.. The rest start new
3.) Battery can stay until 11pm with 20% left after unplug from charges daily at 8am in the morning..

You may want to try my suggestion above.. I don't think i will upgrade to IOS 6.1.2 since i am not Ms Exchange user and i am not affected with the bugs that drain battery.

This post has been edited by sugen: Feb 20 2013, 11:50 AM

Yes.. i got data plan...but WIFI is OFF ... if WIFI is ON whole day.. different story..

WIFI full bar does not mean that you will sure get what you expect. It is also depend on the downloading server capacity.. IF you can download others file with no problem, then that is pretty sure is not a firmware issue. Come on man.. over milions is using 6.1.2 include me.. Don't have this issue..