Get your firmware from a repository like GsmRom.net or Sammobile .
Kaelen tried to dump the firmware. The progress bar froze at 99%. Then, the phone spoke .
Warning: Combination firmware is dangerous. Use it only for FRP removal, then immediately flash back to stock.
There are different types of ROMs, including:
Run the Odin tool on your PC. You should see an ID:COM box turn blue or green once connected.