This post will help those who unlocked iOS 4.2.1/iOS 4.1 on their using ultrasn0w 1.2 and were experiencing GPS issues. The iPhone Dev Team have acknowledged the unfortunate fact of ultrasn0w causing loss of GPS for the iPhone unlockers.

The newly released ultrasn0w 1.2 which unlocked the iPhone 3GS/3G running iOS 4.2.1 by flashing the iPad baseband 06.15.00 using Redsn0w 0.9.6b5 or PwnageTool 4.1.3, has caused two major issues for many iPhone 3GS/3G users, ultrasn0w 1.2 has led to aggressive battery drainage, in addition, iPhone becoming excessively hot. Sherif Hashim, one of the hackers behind ultrasn0w has addressed these issues, let's check out them after the jump.