Can 3GS update from iOS 4.0.2?

[mnya]

I don't think it can to iOS 6... right?
Then can I find iOS 5 somewhere?
iTunes only shows iOS 6 as an available update

Also, I don't know if I really should update...
I'm not trying to get new functions etc.
It's just that my 3GS has been acting up lately and thought updating might fix it?
It quits some Apps when I'm in the middle of using them, Safari freezes sometimes, iCal event alarm goes off at wrong times... stuff like that.
What do you guys think? Thanks!

 

[Xenomorph]

Why would you be on 4.0.2???

If you have your SHSH blobs, you could move to 4.1, 4.2.1, 4.3.3, 5.0.1, or 5.1.1 (the common versions people with a 3GS may want to stay at).

If you do not have your SHSH blobs, then iOS 6.0 (and maybe 4.1) is(/are) your only choices.

There will be literally hundreds of new features and security updates by upgrading, and you will gain current app compatibility (many things need iOS 4.3+, 5.1+, or iOS 6+).

 

[mnya]

Thank you for your reply.
You are the first one to tell me about SHSH blobs... so I guess I don't have any.
Should I save one for my iOS 4 before updating to iOS 6?