I am experiencing seriously bad batt life after upgrading to ios 6.1.2. I really regretted upgrading. Batt life was fine with ios 6.0. After this stupid update, my phone is losing like 10% batt every 1 hr of use. I am seriously very disappointed with Apple. If this is the kind of crap they give to their customers, i am seriously considering a switch to an android phone. For those who have not upgraded their os, please DONT upgrade. I have give up believing in Apple and their claims of upgrades being able to fix problems... because with each upgrade, things will only get worse.