G925T with G925TUVU4EPF1 fault!!!


When i unlock this phone:

Operation: Unlock
Selected model: SM-G925T
Software version: 26.2

Waiting ADB device… OK
Reading phone info…
Model: SM-G925T
Android version: 6.0.1
Product code:
Phone version: G925TUVU4EPF1
PDA version: G925TUVU4EPF1
CSC version: G925TTMB4EPF1
CSC country code: USA
CSC sales code: TMB
HW version:
Phone S/N: R58XXXXXXX
Modem board: SHANNON333
RF cal date:
IMEI:
Checking Super user right… true
Initializating zTool… OK
Running zTool, please wait…
Start… OK
Init… OK
Generate and check client proof… OK
Verify proof by client… OK
Reading data… error (8)

Done with Samsung Tool PRO v.26.2

When i read or write cert:

Operation: Read CERT
Selected model: SM-G925T
Software version: 26.2

Waiting ADB device… OK
Reading phone info…
Model: SM-G925T
Android version: 6.0.1
Product code:
Phone version: G925TUVU4EPF1
PDA version: G925TUVU4EPF1
CSC version: G925TTMB4EPF1
CSC country code: USA
CSC sales code: TMB
HW version:
Phone S/N: R58XXXXXX
Modem board: SHANNON333
RF cal date:
IMEI:
Checking Super user right… true
Initializating zTool… OK
Running zTool, please wait…
Start… OK
Init… OK
Generate and check client proof… OK
Verify proof by client… OK
Reading data… error (8)

Done with Samsung Tool PRO v.26.2

Help please…..