some advise please ?

[fairus]

my friend own an iphone 3gs JB ios 4.2.1 . he interested to ios 5.1 .
i dont know what kind of JB that his iphone 3gs sitting now.

should he upgrade to ios 5.1 ?

 

[Pinkpoison]

i see that you have posted this question before,please don't post more than once.....CLOSED