Open Odin on your computer and connect your phone. The ID:COM box should turn blue or yellow, indicating a successful connection.
In summary, while the “frpfile firmware fix” is a valid technical pathway, it is like taking a back alley through a dangerous part of town—it can get you where you need to go, but the risks are high. For a reliable, safe, and easy solution, the paid alternatives are consistently the better choice.
A flashing tool compatible with your chipset (e.g., Odin for Samsung). Step 2: Boot into Download/Fastboot Mode