G531f unlock Failed


NEED HELP G531f unlock Failed

—————————————————
Waiting For Device… OK
Please Tap on ‘OK’ in ‘Allow Usb Debugging;’ Pop-up on Device Screen!
Device Status: [ONLINE]
Model : SM-G531F
Manufacturer : samsung
Serial No. : R58GB1Y6Y5M
PDA Version : G531FXXU1AOH1
CSC Version :
SW Version : G531FDDU1AOG3
Android Version : 5.1.1
Build ID : LMY48B
IMEI :
Sales/Country Code :
Built Date : Tue Aug 4 19:58:27 KST 2015
Checking Root Permission… OK
Prepairing… OK
Reading NV Data… OK..OK..Fail! -20
Stopping ADB Service… OK
Operation Time: 00:01:07
—————————————————————————————————————————————————————
For Android 2.x.x:
1- Turn-on the Phone Goto ‘Settings > Application > Development’
2- And Check ‘Usb Debugging’ Then Connect Usb Cable To Phone

For Android 4.x.x and Above:
1- Turn-on the Phone Goto ‘General > About’ Tap 7 times on Build Number’
2- Return to General Tab Tap on Developer Options
3- And Check ‘Usb Debugging’ ON Then Connect Usb Cable To Phone

IMPORTANT NOTE: DON’T CONNECT MULTIPLE ANDROID DEVICE IN USB DEBUGGING MODE AT SAME TIME!
—————————————————————————————————————————————————————
Waiting For Device… OK
Please Tap on ‘OK’ in ‘Allow Usb Debugging;’ Pop-up on Device Screen!
Device Status: [ONLINE]
Model : SM-G531F
Manufacturer : samsung
Serial No. : R58GB1Y6Y5M
PDA Version : G531FXXU1AOH1
CSC Version :
SW Version : G531FDDU1AOG3
Android Version : 5.1.1
Build ID : LMY48B
IMEI :
Sales/Country Code :
Built Date : Tue Aug 4 19:58:27 KST 2015
Checking Root Permission… OK
Prepairing… OK
Reading NV Data… OK..OK..OK
Failed to Find Needed Data(1), Possible Damaged NV!
Stopping ADB Service… OK
Operation Time: 00:01:14