Is mine iPhone 3GS an old bootrom?

andres r

New member
Hi I want to know if my iPhone 3GS is an ole boot ROM the model is MC716LL and the serial number is ***30****** pls tell me if it is not or it is old so I can jailbreak to the new one which is 4.2.1? Thanks for answering and helping me out. :D
 
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