Default HTC One S - Ville - S-OFF

I boght a used HTC ONE S with 4.1.1 and 3.16.771.7 with ΗΒΟΟΤ 2.13. When i open it, i saw htc logo's and the a big number 3. I search for it and i found that phone was from Austria (Drei Telecom). I unlocked the bootloader and i root the phone. Did someone knows how i make it S-OFF?