Best iOS ver. for iPhone 3GS?
 

I just got an iPhone 3GS 8gb off eBay the other day...Haven't received it yet. It supposedly has 4.2.1 on it. Should I upgrade any higher? I read somewhere that 4.3.2 is a good ver.? Also...I intend to jailbreak. If I keep 4.2.1 ... Is this the right jailbreak ver. to use... redsn0w 0.9.6b6 ?

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