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the anwser

THE ANWSER IS THIS AND THIS IS IT PERIOD. THERE ISNT A DIFFERENCE OF MC MODELS AND MB MODELS. DOESNT MATTER WHAT COLOR THEY ARE, OR BOOTROM, OR IF IT IS A 3G OR 3GS. THE ONLY DIFFERENCE OF THE TWO IS THE BATCHES OF WHICH WHEN THE PHONES WERE MADE. JUST LIKE A BASEBALL CARD. THE BATCH OF THESE CARDS WERE 1ST EDITION AND THESE WERE LIMITED EDITION. SAME THING WITH IPHONES. THE BATCHES WAS THE MB MODELS THEN THE MC MODELS AND SO ON. SO THERES YOUR ANSWER ;)
 
iPhone 3GS Model

Well i don't know whats the difference from MC and MB, mine is a MB and is jailbreak and unlock with 4.0 and the last bootrom. I just got another 3GS waiting to get delivered to see if is a MC to try jailbreak and unlock. I will post back if i can get it jailbreak and unlock.
 
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