Reading codes using sever:
1. Power on the phone.
2. Tap 7 times on 'Build number' in 'Settings'-'About phone'-'Software information'
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: Read Codes via Server [DIAG May 2020]
Selected model: SM-J400M
Software version: 42.11
Checking Login and Password... OK
Balance: 7 crd.
You have 7 credit(s) left. This operation takes 5 credits. Continue? Yes
Waiting ADB device... OK
Reading phone info...
Android version: 10
PDA version: J400MUBSACTI1
CSC version: J400MOWAACTI1
Phone version: J400MUBSACTI1
Product code: SM-J400MZVMCDR
CSC country code: Dominican Republic
CSC sales code: CDR
Carrier ID: CDR
Phone SN: R28K71VWMGZ
HW version: MP 0.300
RF cal date: 20180723
Chip name: EXYNOS7570
Modem board: SHANNON305
Security patch: 2020-09-01
Boot Warranty bit: 0
SIM State: ABSENT
Initialization zTool... OK
Running zTool, please wait... OK
Reading data from phone... OK
Searching Samsung diag port... detected COM40
Checking diag port... OK
Searching Samsung modem... detected COM39
Searching server... OK
Checking server answer... modem required
There is no information about this firmware on the server.
Done with Samsung Tool PRO v.42.11