Desire 820s RUU file needed

Bootloader shows==>

hTC download mode
*** LOCKED ***
htc_a50ml PVT S-ON
LK-1.01.0000
RADIO-UNKNOWN
OpenDSP-UNKNOWN
OS-1.20.401.1
Sep 25 2015,12:28:06(626611)

D:\adb>fastboot getvar all
(bootloader) kernel: lk
(bootloader) product: htc_a50ml
(bootloader) version: 1.0
(bootloader) imei: ****
(bootloader) version-main: 1.20.401.1
(bootloader) boot-mode: download
(bootloader) version-bootloader: 1.01.0000
(bootloader) mid: 0PGZ10000
(bootloader) cid: HTC__001

Thanks in advance guys