Need Download a Combination Galaxy J2 you can download in this web.

What is Combination Firmware/File?   The Combinations firmware is a mixto software android for remover frp, With the combinations you can, Enable Usb Debugging, Downgrade software, Repair some models like S8+ S8,S7,S7 edge, and more, can remove Bypass Samsung Account. 

If you have combination firmware, then no need to buy any paid tool to remove frp lock, The COMBINATION FIRMWARE, is the best for remover frp free. When use combination firmware need  after that flash STOCK ROM, 

How to flash a combination  firmware

Steps For Flash With ODIN