j320fn write cert file

[hippolyte85]

i av tried to write j320fn cert file without success all root i av tried dont work
my phone is "Modem board: SC9830i" but the root i see is for "SC9830i" and when i use it after phone stuck on logo






BACKUP INSTRUCTIONS:
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 'Read EFS' button to read backup or 'Write EFS' to restore or
press 'Read CERT' button to read certificates or 'Write CERT' to restore.

Operation: Write CERT
Selected model: SM-J320FN
Software version: 27.1

Checking CERT file... ok
KEY ID: 0286
Waiting ADB device... ok
Reading phone info...
Model: SM-J320FN
Android version: 5.1.1
Product code: SM-J320FZWNXEF
Phone version: J320FNXXU0APFG
PDA version: J320FNXXU0APE4
CSC version: J320FNOXX0APD2
CSC country code: France
CSC sales code: XEF
HW version: MP 0.400
Phone SN: R58H34QF49B
Modem board: SC9830i
RF cal date: 2016.03.31
IMEI:
Checking Super user right... false
This model not supported for auto root

Done with Samsung Tool PRO v.27.1

any way to root this phone?