hello. im not new to updating my iphone, jailbreaking and unlocking it, but i have no idea whats going on this time. i have iphone 3GS on firmware 4.2.1, with 06.15.00 Baseband (the ipad bb right?) i tried updating via itunes to firmaware 4.3.3 and it keeps saying "the iphone *** culd not be updated. this devise isn't eligible for the requested built". i read somewhere that this error is because my iphone has the ipad baseband, please corect me if im wrong. i also downloaded custom 4.3.3 firmaware and tried updating via itunes and again i got the same error. please help me, and tell me what should i do to be able to update. i really need to update because everything on my iphone keeps crashing. and this error is driving me crazy. thanks in advance.