Looking into the reveals a specialized software solution designed specifically for the Samsung Galaxy J7 Pro (SM-J730F) Go to product viewer dialog for this item.
A high-quality custom auto-patch build for this device should include: j730f u8 auto patch firmware top
This guide is for and assumes you own the device. Modifying firmware voids warranty, violates Samsung’s KNOX terms, and may breach local laws regarding device modification. The author is not responsible for bricked devices, lost data, or security breaches. Looking into the reveals a specialized software solution
You are trying to flash a U7 or lower firmware on a U8 device. Double-check your firmware version. The author is not responsible for bricked devices,
This usually happens if the EFS partition is damaged. You may need to flash a combination file first or use a professional tool like Z3X or Octopus to repair the original IMEI.