Unable to Unlock S6 Tmobile


I keep getting an error

here is a log:

Welcome to Octoplus/Octopus Box Samsung software version 2.3.7
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To connect SM-G920T 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.
———————————————————————————–
Platform: Samsung Android
Selected port: COM7
Selected model: SM-G920T
Searching for a phone. Please wait…
Phone found.
Detected phone model: SM-G920T
Firmware compiled date: Mon Nov 30 10:58:17 KST 2015
PDA version: G920TUVS3DOJC
CSC version: G920TTMB3DOJC
SW version: G920TUVS3DOJC
Phone SN: R58G415FF7D
Android version: 5.1.1 (LMY47X)
Sales code: TMB
Country: USA
HW platform: exynos5
HW Chip: exynos7420
HW Modem: SHANNON333
Codename: zerofltetmo
Performed by 2.3.7 Software version.
———————————————————————————–
Platform: Samsung Android
Selected port: COM7
Selected model: SM-G920T
Detected phone model: SM-G920T
Firmware compiled date: Mon Nov 30 10:58:17 KST 2015
PDA version: G920TUVS3DOJC
CSC version: G920TTMB3DOJC
SW version: G920TUVS3DOJC
Phone SN: R58G415FF7D
Android version: 5.1.1 (LMY47X)
Sales code: TMB
Country: USA
HW platform: exynos5
HW Chip: exynos7420
HW Modem: SHANNON333
Codename: zerofltetmo
Checking Root:
Phone is Rooted.
Reading security backup, please wait…
Read codes failed
Performed by 2.3.7 Software version.