you can now unlock your phone with:
ultrasn0w v0.9.3
Compatible with basebands/modem firmware…
04.26.08
05.11.07
05.12.01
05.13.04
update: not working with Spirit jailbreak
It doesn’t matter WHAT FW you have as long as you are at 3.0 FW or above and your baseband matches one of the basebands in the list above then this unlock will work for you!
Hit the Edit button on Top-Right
Then Hit the Add button on Top-Left
Then Enter the following URL: http://repo666.ultrasn0w.com and hit the Add Source button.
Once the Source is added to the Cydia, hit the big return to Cydia button at bottom of the screen and then Done button.
Go to Search tab and search for ultrasn0w and install it.