Just found this on rootzwiki. I'm guessing its froyo. Jcase posted its using an old radio but is a new leak.
I haven't tried it yet because after bamf 3.0 there's no way I can go back
http://rootzwiki.com/showthread.php?737-LEAK-New-Thunderbolt-RUU
I haven't tried it yet because after bamf 3.0 there's no way I can go back
http://rootzwiki.com/showthread.php?737-LEAK-New-Thunderbolt-RUU