Sm-n910t unlock fail!


Welcome to Octoplus/Octopus Box Samsung software version 2.2.1
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To connect SM-G925T phone you have to perform the following steps:
1. Disconnect USB cable from phone.
2. Go to Menu->Settings->More->About Device.
3.Tap on "Build number" 7 times to enable developer options.
4. Go to Menu->Settings->More->Developer options.
5. Turn on "USB Debugging" option.
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To connect SM-N910T phone you have to perform the following steps:
1. Disconnect USB cable from phone.
2. Go to Menu->Settings->More->About Device.
3.Tap on "Build number" 7 times to enable developer options.
4. Go to Menu->Settings->More->Developer options.
5. Turn on "USB Debugging" option.
6. Go to dial window.
7. Enter "*#0808#" number.
8. Select "DM+Modem+ADB".
9. Press Home button.
10. Restart phone.
11. Press "Read Info" in software.
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Platform: Samsung Android
Selected port: COM3
Selected model: SM-N910T
Reading info, please wait…
Detected phone model: SM-N910T
Firmware compiled date: Mon Nov 9 22:04:39 KST 2015
PDA version: N910TUVU2DOK2
CSC version: N910TTMB2DOK2
SW version: N910TUVU2DOK2
Phone SN: RF8FC13R0CY
Android version: 5.1.1 (LMY47X)
Performed by 2.2.1 software version
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Platform: Samsung Android
Selected port: COM23
Selected model: SM-N910T
Reading info, please wait…
Detected phone model: SM-N910T
Firmware compiled date: Mon Nov 9 22:04:39 KST 2015
PDA version: N910TUVU2DOK2
CSC version: N910TTMB2DOK2
SW version: N910TUVU2DOK2
Phone SN: RF8FC13R0CY
Android version: 5.1.1 (LMY47X)
Performed by 2.2.1 software version
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Platform: Samsung Android
Selected port: COM23
Selected model: SM-N910T
Reading info…
Mode: Normal
Firmware compiled date: Sep 25 2015
Firmware compiled time: 11:00:00
Firmware released date: Nov 9 2015
Firmware released time: 15:39:49
SW Version: MPSS.DI.3.0.c5-00436-M9625TAARANSZM-1
Detected phone model: SM-N910T
Firmware compiled date: Mon Nov 9 22:04:39 KST 2015
PDA version: N910TUVU2DOK2
CSC version: N910TTMB2DOK2
SW version: N910TUVU2DOK2
Phone SN: RF8FC13R0CY
Android version: 5.1.1 (LMY47X)
Checking Root:
Phone is Rooted.
Reading security backup, please wait…
Backup saved as Security-SM-N910T-02-03-2016_11-38-11 file
Unlocking phone…
Phone unlocking failed
Performed by 2.2.1 software version

Everything was done as guided. Phone is rooted, Debugging mode is on. Dialed *#0808# and set phone to DM_MODEM_ADB

What’s wrong? Please help.