If you enter these and nothing happens, do not worry – it is normal.
A: Only if you enter engineering menus and change values without knowing what they do. Testing codes are 100% safe. How to Use Secret Codes on REDMI A3
These codes have been tested and confirmed to work on most REDMI A3 units. Use them responsibly. If you enter these and nothing happens, do
*#*#4636#*#*