Confusing problem
HTC 820s
I cannot unlock bootloader using any tool. When I use Windroid Toolkit I get this error log
---------
System.ArgumentOutOfRangeException: Length cannot be less than zero.
Parameter name: length
at System.String.Substring(Int32 startIndex, Int32 length)
at WinDroid_Toolkit.MainWindow.<GetUnlockString>d__23.MoveNext()
1:26:18 AM[INFO]:Microsoft Windows NT 6.1.7601 Service Pack 1 64Bit
1:26:18 AM[INFO]:WinDroid Toolkit 3.1.0.0
1:26:18 AM[INFO]:mscorlib 4.0.0.0
1:26:18 AM[INFO]

resentationFramework 4.0.0.0
1:26:18 AM[INFO]:System.Xaml 4.0.0.0
1:26:18 AM[INFO]:System 4.0.0.0
1:26:18 AM[INFO]:MahApps.Metro 1.2.4.0
1:26:18 AM[INFO]:AndroidLib 1.5.2.0
1:26:18 AM[INFO]:WindowsBase 4.0.0.0
1:26:18 AM[INFO]

resentationCore 4.0.0.0
1:26:18 AM[INFO]:AutoUpdater.NET 1.3.2.0
1:26:18 AM[INFO]:System.IO.Compression.FileSystem 4.0.0.0
1:26:18 AM[UPDATE]:AutoUpdater started.
1:26:18 AM[DEVICE]

evice: HTC Desire 820
1:26:20 AM[DEVICE]:Refresh button clicked.
1:26:26 AM[DEVICE]

etecting Device...
1:26:27 AM[DEVICE]:Connected: Fastboot.
1:26:33 AM[HTCTOKEN]:HTC Token ID command started.
1:26:38 AM[DEVICE]

etecting Device...
1:26:39 AM[DEVICE]:Connected: Fastboot.
1:26:39 AM[STRING]:Connected: Fastboot.
1:26:39 AM[HTCTOKEN]:Creating text file.
1:26:39 AM[HTCTOKEN]:Getting token ID.
--------------
An error message appears when getting token ID.
I used another tool called (HTC bootloader unlock), the process failed and I've this error log
--------
adb: reboot-bootloader
adb out:
Reboot success!
fastboot: devices
fastboot out:
fastboot: devices
fastboot out:
fastboot: devices
fastboot out:
fastboot: devices
fastboot out: LC5CNYF06699 fastboot
fastboot: getvar version
fastboot out: version: 0.5
finished. total time: 0.003s
fastboot: getvar version-bootloader
fastboot out: version-bootloader:
finished. total time: 0.002s
fastboot: getvar version-main
fastboot out: version-main:
finished. total time: 0.003s
fastboot: getvar serialno
fastboot out: serialno:
finished. total time: 0.003s
fastboot: getvar product
fastboot out: product: LCSH6752_LWT_KK
finished. total time: 0.003s
fastboot: getvar modelid
fastboot out: modelid:
finished. total time: 0.003s
fastboot: getvar cidnum
fastboot out: cidnum:
finished. total time: 0.003s
fastboot: getvar build-mode
fastboot out: build-mode:
finished. total time: 0.003s
fastboot: getvar boot-mode
fastboot out: boot-mode:
finished. total time: 0.003s
fastboot: getvar security
fastboot out: security:
finished. total time: 0.003s
fastboot: getvar imei
fastboot out: imei:
finished. total time: 0.002s
fastboot: oem get_identifier_token
fastboot out: ...
FAILED (remote: unknown command)
finished. total time: 0.003s
get_device_info_failed
=======================
Please, any help!