: Click Main Partition , navigate to your downloaded firmware folder, and select the main flash file (often labeled C3520OPEN ).
| Problem | Likely Cause | Solution | |---------|--------------|----------| | Odin not detecting phone | Driver not installed / USB cable faulty | Reinstall driver, try different port/cable. | | Flashing fails at “SetupConnection” | Phone not in Download Mode | Re-enter Download Mode correctly. | | Stuck at “TFS write” | Wrong TFS file or bad firmware | Re-download correct region firmware. | | Phone reboots but no display | LCD incompatibility (after flash) | Flash only the CODE/BIN file (exclude TFS). | samsung gtc3520 flash file and tool