hi sir i have read codes of j250f, i have got my read codes, i have lost my 5 credits also,
here is my log.
UNLOCK INSTRUCTIONS:
Unlocking with original MSL code:
Warning! Knox warranty must be active (0x00)!
If you have it voided (0x01(void)), then you can't unlock this phone with MSL.
1. Phone must be powered on.
2. Run dialer and type *#0*# (service mode will appear).
3. Connect the phone to UART cable, choose correct COM port in port settings.
4. Press 'Unlock' button.
5. Paste MSL code in new opened window and press 'OK'.
Reading codes using sever:
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: Read Codes via Server
Selected model: SM-J250F
Selected port: COM5 Z3X BOX Serial Port
Software version: 31.4
Checking Login and Password... OK
Ballance: 35 crd.
You have 35 credit(s) left. This operation takes 5 credits.Continue? Yes
Waiting ADB device... OK
Reading phone info...
Model: SM-J250F
Android version: 7.1.1
PDA version: J250FXXU1AQL5
CSC version: J250FOJV1AQL5
Phone version: J250FXXU1AQL5
Product code: SM-J250FZDDKSA
CSC country code: KSA
CSC sales code: KSA
Phone SN: R28K315Z37H
IMEI: 356452090842348
HW version: MP0.900
RF cal date: 2018.03.09
Chip name: MSM8937
Modem board: MSM8917
Security patch: 2017-11-01
Boot Warranty bit: 0
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
Searching Ramdump interface... COM397 detected
Reading data from phone... OK
Calculating... OK
Searching server... OK
Waiting for server answer... OK
Freeze code: 46262758
NET lock: 07202469
SUB lock: 00000000
SP lock: 00000000
CP lock: 00000000
For check lock status: *#7465625#
Done with Samsung Tool PRO v.31.4
and also youtube link below
https://www.youtube.com/watch?v=bK_z5vLYz04
now problem is my device wont accept that code at all,
please do something or refund me my credit.