hello and welcome to

EASY FIRMWARE GSM SOLUTIONS

today we will show how to fix unable to mount EFS

for   G610F   J7 PRIME

first : flash combination to device

for downloading combination from HERE

after flash combination flash ENG EFS to device

for downloading ENG EFS  from  HERE

after flash COMBINATION and ENG EFS device will boot

with IMEI 00000000000

after boot device repaire IMEI with CHIMERA without root

after repairing IMEI flash stock firmware to device

for downloading STOCK FIRMWARE  from  HERE

after flash stock make root on EFT PRO  and flash it to device

the way to make root on  EFT PRO from HERE

after flash stock and root wait device until boot up

after boot up just make PATCH CERTIFICATION to device

and done fixing unable to mount EFS

best regards 

EASY TEAM