iPhone Is there anyway to update unlocked Iphone 3GS?

[rose2013]

Hi
I have a unlocked/jailbreaked Iphone 3GS its on 4.01ios and i want to update it to atleast 4.3 because all apps need 4.3 or higher.
My phone was bought from 3 and please post how to update it if its possible.

 

[dhlizard]

You can either go to current firmware (6.1.2), 4.1 (still signed for 3GS by Apple) or any firmware you saved the SHSH for.
Those are your options.