SM-T217s

Unable to unlock this device

Welcome to Octoplus/Octopus Box Samsung software version 2.1.4
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To connect SM-T217S 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 "*#3424#" 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-T217S
ADB server killed.
Please, press "OK" button on the phone to allow USB debugging..
Please, press "OK" button on the phone to allow USB debugging..
Detected phone model: SM-T217S
Firmware compiled date: Wed Aug 21 23:22:55 KST 2013
PDA version: T217SVPUAMH9
CSC version: T217SSPTAMH9
SW version: T217SVPUAMH9
Phone IMEI: 9900***********
Phone SN: 00000000000
Android version: 4.2.2 (JDQ39)
Checking Root:
Phone is Rooted.
Reading security backup, please wait…
Backup saved as Security-SM-T217S-18-12-2015_20-17-14 file
Installing service app…
Installing app failed
Phone unlocking failed