Help with removing phone root and restoring back to default

[drog1998]

Hi,

i'm trying to unroot my phone and get it back to stock so that i can update it.

I know that I have S-On so not sure where I go from here?

Do I need to find the right RUU to get it back to the factory default? I have looked for this but unable to find on for Vodafone Austrlaia only Telstra Australia.

I've heard Telstra or Optus ones work but not sure if it's the right version etc.

Please help.