UNLOCK INSTRUCTIONS:
To read security codes using sever:
Knox warranty does not matter.
1. Power on the phone.
2. Tap 7 times on 'Build number' in 'Settings'-'About phone' to enable 'Developer options',
go to 'Settings'-'Developer options' and enable 'USB debugging'.
3. Connect the phone to PC with USB cable, install drivers if needed.
4. Select device in ADB settings.
5. Press 'Read Codes via server' button, write your login and password in window if it will appear.
(Login and password will be saved as default after first input and can be changed in settings.)
Operation: Unlock
Selected model: SM-G973U
Software version: 40.3
Checking Login and Password... OK
Ballance: 7 crd.
You have 7 credit(s) left. This operation takes 5 credits.Continue? Yes
Waiting for device to become ready... OK
Reading phone info...
Model: SM-G973U
Android version: 9
PDA version: G973USQS2ASGB
CSC version: G973UOYN2ASGB
Phone version: G973USQS2ASGB
Product code: SM-G973UZIAVZW
CSC country code: USA
CSC sales code: VZW
Phone SN: RF8M648JAZZ
IMEI: 352329100510004
HW version: REV1.0
RF cal date: 2019.06.28
Chip name: SM8150
Modem board: SM8150
Security patch: 2019-07-01
Boot Warranty bit: 0
SIM State: ABSENT
Rebooting phone... OK
Waiting ADB device... OK
Waiting for device to become ready... OK
Initialization zTool... OK
Running zTool, please wait... OK
Reading data from phone... OK
Searching server... OK
Waiting for server answer... OK
Calculating... OK
Freeze code: 95083182
NET lock: 60584140
SUB lock: 00000000
SP lock: 00000000
CP lock: 00000000
SIM lock: 00000000
For check lock status: *#7465625#
Rebooting phone... OK
Done with Samsung Tool PRO v.40.3
I tried again, I still the sasme, I do not know why it's giving me an unlocking code when the phone doesn't ask for it, please refund credits.