Default [Q] how to downgrade hboot 1.11.0011 to 1.11.0003 to s-off htc flyer tablet

Hello everyone i try to get s-off with my htc flyer tablet but with no success, i tried everything really, can someone help me to change the hboot ?

thank you


UNLOCKED
flyer pvt ship s-on rl
HBOOT-1.11.0011
MICROP-0950
Radio-3822.10.08.07_M
eMMC-boot
3.60.709.4
fastboot getvar cid : HTC__621


I found this RUU_Flyer_HC_S_hTC_Asia_TW_3.60.709.4_Radio_20.480 1.30.0822U_3822.10.08.07_M_release_236665_signed