hi!! i got an iphone 4.. originally its was IOS 4.1, baseband 2.10.04, but the blob is 6.01, and softbank japan locked so i cannot upgrade my baseband.. first i did was save the blob by Tiny Umbrella 6.01.01 and identified iphone4 6.01 (10A523) then i use Redsnow 0.9.15b3 to save my baseband...