I KNOW , I KNOW...I'M WAAAAY BEHIND ON THIS BUT...
i want to update my firmware on my 3GS to 4.1 or higher
it is Unlocked and Jailbroken and i'm using it on T-Mobile
Firmware 3.1.2 (7D11)
SiNful iPhone 5.6
can someone direct me to a tutorial or youtube link that will show me how to do this, never done this before...I could pay someone local to update it for me but i like to learn new things. THANKS