samsung G920f security area damaged

Help me to solve security area damaged,when I try to repair imei the message pops up The imei is 350000000000000006/01.So it cannot pick any network emergency calls showing only

Operation: Write CERT
Selected model: SM-G920F
Software version: 26.4

Waiting ADB device... OK
Reading phone info...
Model: SM-G920F
Android version: 5.0.2
Product code:
Phone version: G920FXXU1AOCW
PDA version: G920FXXU1AOCV
CSC version: G920FOLB1AOCW
CSC country code: MALAYSIA
CSC sales code: XME
HW version:
Phone S/N: R58G41ES7AH
Modem board: SHANNON333
RF cal date:
IMEI:
Checking Super user right... true
Initializating zTool... OK
Running zTool, please wait...
Start... OK
Init... OK
Generate and check client proof... OK
Verify proof by client... OK
Reading data... OK
HWID: 08 DF 01 ED 97 07 00 00 00 00 00 00 00 00 00 00
Checking certificate file... OK
KEY ID: 0346
Reading nv data... OK
Checking NV data... error
Security damaged (1)
Done with Samsung Tool PRO v.26.4

1. Try unlock and show log.
2. Check may be new nv_data backup will be created and attach.
3. Read EFS.
4. Open CERT and edit imei there to your original.
5. Write CERT to phone.


if phone will work this can be bug in samsung firmware.
if firmware now and before 1st unlock not same, may be user played with something and did some changes in EFS.


anyway do all steps and tell me result.