ORIGINAL SAMSUNG TEST CODE 2022
To find the hidden menu, open the dial pad and enter *#0*# with no spaces.
Numerous buttons can run tests for vibration, RGB colors, touch-screen sensitivity, speaker output and so on. The color checks could be useful to single out dead pixels, but much of the menu functions might be a bit technical for the ordinary user.
You can also perform sensor checks; the accelerometer sensor ensures photos are aligned correctly on your phone (for example, that they are displayed upright rather than slanted or off-axis).
For this test, the phone displays a picture of a chihuahua. Hit the “sensor” button on the hidden menu; the screen should display raw data related to your phone’s sensors.
Another function is the touch-screen tracker, which traces the path of your finger. The speaker test plays a generic song rather loudly, so avoid testing this one out in public.