Finally j500F no service problem solved

[kothamamun]

press 'Write CERT' to restore certificates.

To backup/restore QCN, phone diagnostic port must be enabled.
1. Power on the phone.
2. Type *#0808# and select 'DM+MODEM+ADB'.
3. Type *#9090# and select 'DM/DUN over HSIC'.
Or use 'Activate Diag' function from 'Repair' tab.
4. Connect the phone to PC with USB cable, install drivers if needed.
5. Select diagnostic port in port settings.
6. Press 'Read QCN' button to read NV backup or 'Write QCN' to restore.

Operation: Write CERT
Selected model: SM-J500F
Selected port: COM30 SAMSUNG Mobile USB Serial Port
Software version: 29.9

Checking CERT file... OK
KEY ID: 0338
Waiting ADB device...
Please, allow USB debugging on phone... OK
Reading phone info...
Model: SM-J500F
Android version: 6.0.1
Product code: Not Active
Phone version: J500FDDU1BQG1
PDA version: J500FXXU1BQH4
CSC version: J500FODD1BQH4
CSC country code: India
CSC sales code: INS
HW version: MP 0.600
Phone SN: RZ8G709RXLH
Modem board: MSM8916
Security patch: 2017-08-01
RF cal date: 2015.08.11
IMEI: 352141070336678
Writing AT RIL... OK
Initialization AT RIL... root required
Checking Super user right... true
Initialization AT RIL... OK
Bypass MSL... OK
Checking for compatible phone and cert... OK
Phone KEY ID: 0338
Writing CERT... OK
Checking CERT status... OK
Rebooting phone... OK

Done with Samsung Tool PRO v.29.9