If you are trying to flash stock firmware using Odin and the ID:COM port does not turn blue or yellow, your PC is failing to initial the Samsung Modem driver required for the Exynos 3830 bootloader.
When drivers are deeply corrupted or modified improperly, the only verified fix is completely overwriting the device's storage partition with a clean, official Samsung ROM. This process reinstalls the factory-fresh kernel and hardware drivers. Prerequisites A Windows-based computer. An original Samsung USB data cable. (The official Samsung flashing software tool). Samsung USB Drivers installed on your PC. driver exynos 3830 fixed verified