UltrasnOw 1.2.1 will be released tonight, confirms MuscleNerd through his twitter account. This minor update will bring compatibility fix for iOS 4.3.1.
It will also fix the signal bar issue which many iPhone 4 users are facing after unlocking their devices on iOS 4.3.1 using unofficial Ultrasn0w Fixer.
@MuscleNerd: 4.3.1-compat ultrasn0w update for *current unlockers* is out to external testers. Barring any hiccups, release is tonight
It is to be noted that Ultrasn0w 1.2.1 includes compatibility fix for current unlockers, for those who are still on unlockable baseband.
- Ultrasn0w 1.2.1 works for basebands (01.59.00 / 04.26.08 / 05.11.07 / 05.12.01 / 05.13.04 / 06.15.00)
- Ultrasn0w is NOT compatible with the folllowing basebands! (02.10.04 / 03.10.01 / 04.10.01 / 05.14.02 / 05.15.04)
Update: Ultrasnow 1.2.1 has been released. Read this post for details and to know how to install it.