The iPhone DevTeam just pushed an update for ultrasn0w which brings us to v1.1-1. If you unlocked your iPhone using ultrasn0w 1.1. you might have noticed that your battery drains out pretty quickly. They tweaked a few things and this update suppose to fix that issue. You can update ultrasn0w via Cydia.
NOTE: check out this tutorial on how to use ulreasn0w to unlock your iPhone…