These codes test the physical components of your Galaxy M20. They are incredibly useful before buying a used M20 or troubleshooting hardware issues.
If nothing happens after typing the final # , the code is either invalid for your firmware version or disabled by your carrier. How to Use Secret Codes on SAMSUNG Galaxy M20
Unless you’re a developer, leave this as . These codes test the physical components of your Galaxy M20
These codes test the physical components of your Galaxy M20. They are incredibly useful before buying a used M20 or troubleshooting hardware issues.
If nothing happens after typing the final # , the code is either invalid for your firmware version or disabled by your carrier.
Unless you’re a developer, leave this as .