820n a51_ul - Only Fastboot No recv No ruu !

ANy help !!! Cannot unlock bootloader rebbot on fastboot

Reading information...
Using Fastboot mode...
Reading common information
(bootloader) version: 0.5
(bootloader) version-bootloader: 3.19.0.0000
(bootloader) version-baseband: 01.01.010_U10305041_08.01.50512
(bootloader) version-cpld: None
(bootloader) version-microp: None
(bootloader) version-main: 2.10.401.4
(bootloader) version-misc: PVT SHIP S-ON
(bootloader) serialno: HT583YC00953
(bootloader) imei: 355721064387675
(bootloader) imei2: Not Support
(bootloader) meid: 00000000000000
(bootloader) product: a51_ul
(bootloader) platform: hTCBmsm8939
(bootloader) modelid: 0PFJ40000
(bootloader) cidnum: HTC__J15
(bootloader) battery-status: good
(bootloader) battery-voltage: 0mV
(bootloader) partition-layout: Generic
(bootloader) security: on
(bootloader) build-mode: SHIP
(bootloader) boot-mode: FASTBOOT
(bootloader) commitno-bootloader: da038a09
(bootloader) hbootpreupdate: 11
(bootloader) gencheckpt: 0
(bootloader) mfg-name: 0001
all: Done!