unlock error g960u t-mobile

Checking Login and Password... OK
Ballance: 30 crd.
You have 30 credit(s) left. This operation takes 10 credits.Continue? Yes
Waiting ADB device... OK
Reading phone info...
Model: SM-G960U
Android version: 8.0.0
PDA version: G960USQS3ARG8
CSC version: G960UOYN3ARG8
Phone version: G960USQS3ARG8
Product code: SM2G960UZPATMB
CSC country code: USA
CSC sales code: TMB
Phone SN: R58K65FTZWN
IMEI: 35691xxxxxxxxx
HW version: REV1.1
RF cal date: 2018.06.28
Chip name: SDM845
Modem board: SDM845
Security patch: 2018-08-01
Boot Warranty bit: 0
Searching Samsung diag port... detected COM350
Reading phone info... OK
Reading data from phone... error (0), skip
Rebooting phone... OK
Waiting ADB device... OK
Rebooting phone... OK
Waiting ADB device... OK
Waiting for device to become ready... OK
Initialization zTool... OK
Running zTool, please wait...
Start... OK
Initialization... OK
Generate and check client proof... OK
Verify proof by client... OK
Reading data from phone... OK
Rebooting to upload... OK
Searching Ramdump interface... COM341 detected
Reading data from phone... OK
Calculating... error (0)

Done with Samsung Tool PRO v.33.8


any help