This is just a quick heads-up. It looks like the Dev Team has just pushed ultrasnow 1.2.1 unlock for iOS 4.3.1 out to the public. In fact, this isn’t a new unlock, it just allows those who are already unlocked to use iOS 4.3.1. It also fixes the signal bar issue for those who aren’t using the unlock but retain an older baseband intentionally. As we mentioned, ultrasnow 1.2.1 does not add unlock support for any new baseband versions, it was updated simply so users on the iOS 4.3.1 firmware can use ultrasnow unlock to maintain their current unlock. Read the official word from the Dev Team below.




ultrasnow 1.2.1 Changelog :

* iOS 4.3.1 support
* No new baseband support
* Fixes signal bar issue

ultrasnow 1.2.1 unlocks basebands :

* iPhone 4 : 01.59.00
* iPhone 3GS : 04.26.08, 05.11.07, 05.12.01, 05.13.04, 06.15.00

Here is a word from Dev Team :

We’ve pushed out the 4.3.1 compatibility fix for ultrasnow in Cydia — it’s now at version 1.2.1.  If you’re not already at 4.3.1 and you need the unlock, please be sure you understand how to get to 4.3.1 using a custom IPSW that doesn’t update your baseband. This isn’t a new unlock! It’s to allow those who are already unlocked to use FW 4.3.1.  It also fixes the signal bar issue for those who aren’t using the unlock but retain an older baseband intentionally.

Note : After installing ultrasnow 1.2.1 unlock for iOS 4.3.1, reboot your iPhone using the normal “slide to power off” swipe.  T-Mobile users in the USA also should disable 3G mode in Settings > General > Network.

We will have a guide available shortly for those of you who require assistance with using ultrasnow 1.2.1 unlock for iOS 4.3.1. For those who are comfortable using ultrasnow 1.2.1,  can find ultrasnow 1.2.1 unlock via Cydia.