[SandyBridge]

J530F 8.1.0 successfully unlocked with triggered knox

  UNLOCK INSTRUCTIONS:
    To unlock:
    Phone must be rooted!
  If the software can't root the phone automatically, 
  then you must root your device manually.
  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 'Unlock' for direct unlock.
  
    Reading codes using sever:  
    Warning! Knox warranty must be active (0x00)!
    If you have it voided (0x01(void)), then you can't unlock this phone using sever.
  1. Power on the phone.
  2. Type *#0808# and select 'DM+MODEM+ADB'.
  3. Connect the phone to PC with USB cable, install drivers if needed.
  4. 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-J530F
Software version: 34.6

Checking Login and Password... OK
Ballance: 15 crd.
You have 15 credit(s) left. This operation takes 5 credits.Continue?  Yes
Waiting ADB device... OK
Reading phone info...
Model: SM-J530F
Android version: 8.1.0
PDA version: J530FXXU3BRJ2
CSC version: J530FOXX3BRJ1
Phone version: J530FXXU3ARI1
Product code: SM2J530FZDABGL
CSC country code: Bulgaria
CSC sales code: BGL
Phone SN: RF8J90xxxxx
IMEI: 3515540xxxxxxxx
HW version: MP 0.500
RF cal date: 20170919
Chip name: EXYNOS7870
Modem board: SHANNON315
Security patch: 2018-10-01
Boot Warranty bit: 1
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: 80802816
NET lock: 80805393
SUB lock: 00000000
SP lock: 00000000
CP lock: 00000000
SIM lock: 00000000
For check lock status: *#7465625#

Done with Samsung Tool PRO v.34.6

Modem downgrade file
FA_CP_J530FXXU3ARI1.tar