HT1688 I just got an old Iphone 3g with 4.2.1, i would like to upgrade to the ios5. Can this be done and how?

I just got an Iphone 3g with the version 4.2.1 ios, I would like to upgrade to ios5 so i can run more apps like facebook. The facebook app wants version 4.3 ios and newer. Can i upgrade the 4.2.1 ios to iso5 and how do I do that? Thanks

Only if you have an older version of the facebook app that will work on iOS 4.2.1.
Otherwise, use the facebook mobile site.

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