Writing EFS poblam

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 EFS
Selected model: SM-J210F
Software version: 27.0

Waiting ADB device… ok
Reading phone info…
Model: SM-J210F
Android version: 6.0.1
Product code: SM-J210FZSDBNG
Phone version: J210FXXU0APF8
PDA version: J210FXXU0APG1
CSC version: J210FODD0APG1
CSC country code: Bangladesh
CSC sales code: BNG
HW version: MP 0.200
Phone SN: 00000000000
Modem board: SC9830i
RF cal date: 2016.07.19
Checking Super user right… true
Extracting EFS file… ok
Converting Img to Ext4… ok
Writing EFS to phone… error

Done with Samsung Tool PRO v.27.0