Check a Samsung Device Using Secret Code *#0*#[Diagnosis, Screen, Sensors]


Devices nowadays host a lot of features besides being just a touchscreen toy. They consist of lots of state-of-art electronics like sensors, pop-up selfie motors, and whatnot. Some of the flagship devices also come with a heart rate sensor and a barometer; Some Samsung devices also come equipped with an altimeter to measure the height from the sea level. After hearing all this, it becomes necessary to test them when buying or checking a product. So today, in this article, we will discuss a secret code that is exclusive to Samsung devices and is considered an all in one.

Check a Samsung Device Using Secret Code *#0*#

What is the Samsung Secret Code?

Many of our users out there are using a Samsung device. Most of the users don’t have the knowledge of checking their smartphone’s internal components using codes. These codes communicate with the operating system to provide the general information of what is available and what is its condition. So today, we will discuss a secret diagnosis code that is exclusive to Samsung devices. Not to worry for other brand smartphone users as we have already covered the secret codes from other manufacturers. If you own a Samsung device, you might love this code and apply it to your device for self-diagnosis.

The code which we are going to discuss today is *#0*#. But to start with this code, it is wise noting that some carriers stop using these codes on most of their handsets—especially the Verizon ones. So if you have a Verizon Samsung device, this code may seem not so useful. Others can continue as this code can simply be termed as God Mode for Samsung devices.


Diagnosing a Samsung Device

To start with the diagnosis procedure, you have to keep the code *#0*# handy. Firstly open the phone dialer and type the mentioned code. As soon as you press the last #(Hash), a secret menu opens and lists tabs of diagnosis tools and the sensors available on the device. These tabs, when clicked, open a screen with diagnosis functions built-in for testing the device. If nothing happens, it merely means that the code is blocked on your device by the carrier. We will discuss each and every tab in detail Below.

Red Green & Blue Screen Tabs

The first row, when opened, consists of these three tabs, Red, Blue, and Green. They are simply screen testing colors. So to differentiate, you need to bring the device closer to your eyes and observe each color carefully. This test also notifies if there is any dead pixel issue with the smartphone. Actually, the three main colors which compose the display of the screen are made up of RGB-red, blue and green. So if your device doesn’t have any dead pixel issue or color rending problem. You are good to go. Press the back key to exit this test.

Or, if you are sure that your device is excellent, you can simply skip the test and move on to other criteria, which we have discussed below.


Next comes the receiver test. If you click on this, the phone will play a tune through the earpiece that is called the receiver. You need to bring the phone closer to the ears. If you experience low sound, there may be a problem with your receiver speakers. If everything is fine, move on to the next. Press the back key to exit this test.


When you on this, the scene will go blank, and the phone will start to vibrate. This simply checks the vibration motor inside your device. You can also check this if you have issues with the vibration of your device. Press the back key to exit this test. Move on to the next for more.


Clicking on this will start the screen in three colors red, blue, and green, which will become dim and bright by tapping on it. This test is done to understand that the screen still has the ability to adjust the brightness accordingly. Press the back key to exit this test.


Mega  Cam

As the name suggests, this test switches on the primary camera of the device and lets you understand that the device is able to interact with the camera hardware. You can zoom in and out by using the volume rockers and click an image using the button below. Also, the image you capture will be saved in the gallery. When completed, press the back key to exit this test.


Tapping on this button will open a list of sensors installed on your device, and then you can click on each one of the sensors to check whether they are working correctly or not. The primarily available sensors are an accelerometer, gyroscope, magnetic sensor, ambient light sensor, and a fingerprint scanner. On flagship devices, they might include an HRM (Heart Rate Monitor) and a Barometer. We will now discuss the individual sensor diagnosis in detail.


An accelerometer is an important Sensor on a smartphone. It is primarily used to detect the orientation of a smartphone and rotate the content accordingly. The accelerometer is also used by video games that involve tilting and correcting. If you discover problems in the automatic rotation of your device, you need to test it out. Accelerometer settings picture of a dog will appear, which will rotate if you tilt your smartphone. When checked, press the back button to exit this diagnosis.


Proximity Sensor

Proximity, as the name suggests, is the distance measuring sensor of the smartphone. It activates when the user dials a number and brings the phone near to his ears, and the screen display turns off. In this test, you bring your hands closer to the sensor; the phone screen turns green and vibrates. If you are experiencing turning off display issues in a call, you can check this out. If checked, press the back button to exit the test.

Light Sensor

The Ambient Light Sensor detects the light coming to the smartphone and adjusts the brightness accordingly. To test this, you need to take your phone below a light source and change the intensity. There are a total of three levels, with level 1 is the lowest and highest being level 3. If you’re having trouble with adjustment of brightness under sunlight. You might need to check this out. Else, touch the back button to exit this test.

Barometer(Flagship Exclusive)

Originally Barometer is a sensor that is used to detect air pressure. But in smartphones, the case is a little different. In smartphones, the Barometer is a sensor that detects altitude, and also it helps the tracking of GPS more accurately. Checking this is simple; just tap the Barometer self-test, and you will get to know whether its working or not.


This sensor works alongside an accelerometer to assist in proper rotation. This test paints a picture graph that tells you the performance of the gyroscope. You can perform a self-check just by rotating the device. If the graph is satisfactory, then the performance is accurate. Move on to the next test after pressing the back button.

Magnetic Sensor

The Magnetic Sensor is the compass of your smartphone, which further helps in location tracking of the GPS. You can simply rotate the phone to view the performance of the magnetic sensor. Move on to the next test after pressing the back button.

Heart Rate Monitor (Flagship Exclusive)

This sensor on your smartphone will check your heartbeat when you put your fingers at the back beside the camera. If you see accurate heart rate graphs, your HRM is working right. Move on to the next test.

Fingerprint Sensor

The fingerprint sensor on your device is checked in this test. If the fingerprint is successfully registered, it shows Pass. Else, it shows Fail. You can carry on this test multiple times because it fails many times due to external causes.

Having completed the sensor department, we are ready to move on to the other diagnosis. Let’s continue


In the touch test, the screen of your phone is tested to register touches. It shows you crisscross tiles which, when touched or slid hands-on, turn green from white. In order to exit this test, you have to turn all the tiles to green. After this test, you will be sure about your touch screen.


With this diagnosis, the sleep function of your device is tested. If you click on this, the phone immediately goes to sleep mode. Upon waking, you’re taken to the primary diagnosis page.


This diagnosis plays the sound through the main speaker of the smartphone. If you’re able to hear music, then you’re good to go. Press the back key to exit this test.


This diagnosis simply checks the hardware buttons on the device. Which when pressed, the screen changes its color. For example, if you press the volume up key, it changes to pink so on. Press the back button after this test.

Front Cam

Clicking on this checks your front camera performance. You can click your selfie and check if the results are satisfactory or not. Further, the resulting image is stored in the gallery. Press the back button to exit this test.

Grip Sensor

Grip Sensors are installed on the devices to assist the device in lighting the screen when the phone is picked. You can simply check this by holding the phone in your hands and then putting it back down.

Hall IC

Some smartphones come equipped with the Hall IC sensor. The primary work of this is to detect magnetic covers and turn the display on and off when needed.

After the full diagnosis is completed, you can exit the diagnosis mode by pressing the back key twice. This will take you to the home screen.

About Diagnosis and Secret Code

Today in this article, we have discussed several tests that can be performed from the secret menu that comes after dialing the code *#0*#. These tests can be useful when someone is experiencing issues with his devices. We also recommend performing this test to the users who are going to buy their smartphones from the pre-owned markets, so that nobody can trick you in buying the wrong. Thank You!

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