







There's a hidden menu that allows you to test for dead pixels, touch sensitivity issues and colour accuracy. Here's how to use the Samsung display check code.
Learn how to test your Samsung Galaxy device hardware, monitor battery, storage, memory, security, and optimize device performance.
How to Run Self-Diagnostics on Your Samsung Galaxy Phone Discover how to use built-in diagnostic tools on Samsung Galaxy devices to identify hardware and software issues, including battery, display, and sensor problems.
In Test Mode, Samsung devices typically offer a wide variety of tests that assess hardware and software functionalities. Common tests include touch screen sensitivity, display brightness and color calibration, camera performance, speaker and microphone tests, and sensor evaluations such as accelerometer and GPS accuracy.
To test for this feature, simply cover the top of your phone with your hand. The screen should now turn green if the proximity sensor works, so uncover the screen to turn the screen white and proceed to the next test.
What Is a Diagnostic Test on a Samsung Phone? A diagnostic test is a structured way to check the health and functionality of your mobile phone. It helps identify whether an issue is related to hardware, software, or user settings. On Samsung smartphones, diagnostic tests can check: Display and touch response Battery condition and charging Speaker and microphone Camera and vibration motor ...
Easily test your phone with the Samsung screen test code. Learn how to check display issues using secret codes and ensure your screen works perfectly.
Test your Samsung Galaxy screen for dead pixels, stuck pixels, discoloration, backlight bleed and other display faults — directly in your browser, with nothing to install. Just open the full-screen test, cycle through the solid colours, and inspect the screen closely.
Are you looking for Samsung secret codes that still work in 2026? Here is the complete list of test codes, diagnostic codes and reset codes for Samsung phones along with how to use them.







