RUU file is downloaded from htcdev, downloads section:
RUU_SAGA_ICS_35_S_HTC_Europe_14.01.401.2_Radio_20. 76.30.0835_3831.19.00.110_release_275068_signed.ex e
Some details from the bootscreen:
SAGA PVT SHIP S-ON RL
Aug 22 2011, 15:22:13
The phone is bought in Norway and is not locked to any particular service provider.
From the HTCdev website it looks like this is a procedure they support, I'm just not able to figure it out. Please advice.