Do not try to SBF back to 2.1 if you did the OTA 2.2 update. It will brick your phone completely. New bootloader version is 30.03 I tried to SBF back to 2.1 after doing to OTA 2.2 update and you cant. RSD finishes the SBF, but when the phone is suppose to reboot it wont. Instead you get an error "Err:A5,70,70,00,1F" on the bootloader. Won't let you boot to recovery or nothing. Just boots to bootloader. So Im bricked till theres a fix..