Download ultrasn0w 0.92 Carrier Logo Fix
Ultrasn0w 0.92 has just been released that fixes the carrier logo on unlocked iPhone 3.1.2 firmware.
Users who jailbroke their iPhone using PwnageTool 3.1.4 or later, must have noticed that the carrier name went missing after jailbreaking. This was a known bug and the Dev-Team has been quick enough to release a fix for that.

