note 5 tmobile unlock error

Reading phone info…
Model: SM-N920T
Android version: 5.1.1
Product code: SM-N920TZKATMB
Phone version: N920TUVS2COKC
PDA version: N920TUVS2COKC
CSC version: N920TTMB2COKC
CSC country code: USA
CSC sales code: TMB
HW version: REV0.2
Phone S/N: RF8G71PF87J
Modem board: SHANNON333
RF cal date: 20150722
IMEI:
Checking Super user right… true
Initializating zTool… OK
Running zTool, please wait… error (7.7.8)
Done with Samsung Tool PRO v.23.9