After you have done a good job to updated your iOS device baseband to 06.15.00 either using Redsn0w or PwnageTool, yet you find another unwanted issue effecting your battery life after Ultrasn0w was smoothly installed on 6.15.00 baseband, your battery drains quicker than it used to. Before blaming on Ultrasn0w, I tell you the cause of such problem is because you hacktivate you iPhone using PwnageTool & Redsn0w, not using an official carrier sim in activation process.
So here are the ways you can try to fix iPhone battery drain After Installing Ultrasn0w
- Why not use the official SIM to activate your device, this can fix the problem.
- Let's say you don't own official SIM, and there is no way to get it. You can visit Cydia, and install SBsettings inside Cydia packages, then turn off your wifi and data when you don't want to use them
[thanks to SherifHashim]