Simple solution
one. Open Z3x and choose the number G935w8.
2. Choose Read Codes by Server, do not worry, do not require any credit.
3. Install the SIM card from another provider.
4. Entry code and that's it. Success.
There is no need for an ENG or root modem. It works in bit 6. See below the records.
Operation: Read Codes via Server
Selected model: SM-G935W8
Selected port: COM67 SAMSUNG Mobile USB Serial Port
Software version: 36.8
Checking Login and Password ... OK
Ballance: 12 crd.
You have 12 credit (s) left. This operation takes 0 credits.Continue? And it is
Waiting ADB device ... OK
Reading phone info ...
Model: SM-G935W8
Android version: 8.0.0
PDA version: G935W8VLU6CSB2
CSC version: G935W8OYA6CSB2
Phone version: G935W8VLU6CSB2
Product code: SM-G935WZKATLS
CSC country code: Canada
CSC sales code: TLS
Phone SN: RF8H81FZ6WA
IMEI: 356160071979480
HW version: REV0.1
RF cal date: 20160815
Chip name: EXYNOS8890
Modem board: SHANNON335
Security patch: 2019-02-01
Boot Warranty bit: 0
SIM State: ABSENT
Initialization zTool ... OK
Running zTool, please wait ... OK
Reading data from phone ... OK
Searching server ... OK
Checking server answer ... OK
Executing ... OK
Reading data from phone ... OK
Calculating ... OK
Searching server ... OK
Waiting for server answer ... OK
Freeze code: 04830481
NET lock: 95182962
SUB lock: 00000000
SP lock: 00000000
CP lock: 00000000
SIM lock: 00000000
For check lock status: * # 7465625 #