What I did earlier:
Tried S-on with Firewater - didn't work - gave up- didn't spend money for getting S-off via moonshine
Installed custom roms
NOW, I need to go back to slock and claim some warranty issue (speakers too harsh)
Here's is an at&t RUU
Can I go back to stock from here? Do I certainly need S-off? Do I just run RUU exe?