Use the Hidden Samsung Developer Menu to Test Your Galaxy S7

Edited by David Mason, VisiHow, Eng, Anonymous and 2 others

Developers always have secret menus to test phones and phone functions. Most of the time, these menus are never shared with the public, and the Samsung Galaxy S7 and S7 Edge phones are no different. However, we have managed to obtain access to a secret Samsung code that allows you to test all of the core functions for your Samsung phone or tablet. This means if your accelerometer is not working or if you want to test the screen for dead pixels, then you can run tests. The menu is easy to enter and easy to exit. What's great about it though is that if you're buying a new or used phone, it's a great way to test features and functions that you otherwise would have a very difficult time testing. In the tutorial below, we are going to go over how to access the secret Samsung menu and each of the device functions it allows you to test. Read on for details.

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Accessing the Hidden Samsung Test Menu

Accessing the hidden Samsung menu is actually very easy. In order to reach this menu, you will need to perform the steps listed below. Just make sure you read the next section on how to exit the menu before you enable it.

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  1. 1
    Unlock your Samsung Galaxy phone or tablet.
    This is done by swiping across the screen, entering in your PIN, passcode, pattern, or using a fingerprint.
    Use the Hidden Samsung Developer Menu to Test Your Galaxy S7 67129.jpg
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  2. 2
    Once your Galaxy phone or tablet is unlocked, locate the green phone icon that you would normally use to make calls.
    When you find the phone icon, tap one time on it.
    Use the Hidden Samsung Developer Menu to Test Your Galaxy S7 22133.jpg
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  3. 3
    Make sure you are on the dial pad.
    If you don't see the keys to the telephone dial pad, then simply press one time on the phone pad icon. This icon is on the lower-right side of your device screen when you are in the phone menu.
    Use the Hidden Samsung Developer Menu to Test Your Galaxy S7 28309.jpg
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  4. 4
    From the dial pad, you will need to enter a code.
    Note that when you enter this code, the phone will immediately go to the secret Samsung service menu. So, be prepared for your phone to immediately go to the menu and ensure that you read the next section on how to exit the menu. The hidden code you will need to enter is as follows: *#0*# (In our screen shot, we haven't entered in the last '#' yet, but you will need to do that to enable the menu).
    Use the Hidden Samsung Developer Menu to Test Your Galaxy S7 69303.jpg
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  5. 5
    You should now see the Samsung test menu.
    If you see the menu in the image listed below, then you have entered the code properly. Proceed to the section of this guide on how to exit the menu and then on how to use this new menu. If you do not see the image below, then please return to the previous step and enter the code again. If the code does not work, you will need to view our tutorials on how to tell if your Samsung Galaxy S7 or your Samsung Tab S2 is original.
    Use the Hidden Samsung Developer Menu to Test Your Galaxy S7 16472.jpg
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Exiting the Samsung Diagnostic Test Menu

Before you get started with the menu, it's important that you know how to exit and close the menu. In order to exit the hidden Samsung diagnostic menu, you will need to follow a few simple steps.

  1. 1
    Tap the back button twice to exit the menu screen.
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  2. 2
    You will be taken back to the phone dial pad.
    Use the Hidden Samsung Developer Menu to Test Your Galaxy S7 98908.jpg
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  3. 3
    Press the soft menu button on the left side of the phone.
    Use the Hidden Samsung Developer Menu to Test Your Galaxy S7 13098.jpg
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  4. 4
    Tap the 'X' at the top-left of the diagnostic menu, and it will be closed.
    Use the Hidden Samsung Developer Menu to Test Your Galaxy S7 81749.jpg
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Using the Hidden Samsung Test Menu

Once you are in the secret Samsung test menu, you will see a series of icons. There are 22 icons in total. Each icon tests a different function of your Samsung Galaxy phone or tablet. In the section below, we will show you each of these options from our Samsung Galaxy S7 Edge

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Testing Color Functions for Dead Pixels

  1. 1
    To test the red, green, or blue colors of your phone, tap on any of the color buttons one time.
    We will use green in our example.
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  2. 2
    You should see a green screen, as shown in the image provided below.
    Use the Hidden Samsung Developer Menu to Test Your Galaxy S7 49917.jpg
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  3. 3
    When you are satisfied that the image is good and, specifically, has no dead pixels, simply tap on the screen one time or press the back button to return to the menu.
    Ascertain to test all of the colors. Sometimes, a dead pixel will only show on one color.
    Use the Hidden Samsung Developer Menu to Test Your Galaxy S7 31929.jpg
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Testing the Phone Receiver

  1. 1
    To test the phone receiver, tap on the receiver button one time.
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  2. 2
    The screen should turn white, and you should hear a dial tone.
    Use the Hidden Samsung Developer Menu to Test Your Galaxy S7 57871.jpg
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  3. 3
    When you are satisfied that the receiver is working, tap one time on the screen to go back to the menu.
    Use the Hidden Samsung Developer Menu to Test Your Galaxy S7 35724.jpg
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Testing Phone Vibration

  1. 1
    To test the phone vibration, tap once on the 'Vibration' button.
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  2. 2
    The phone screen will now turn black and begin vibrating.
    Note that the phone will continuously vibrate until you have tapped the screen again; so, it is important to stop the test before too long.
    Use the Hidden Samsung Developer Menu to Test Your Galaxy S7 82607.jpg
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  3. 3
    Tap on the screen to exit the test.
    Remember that leaving the phone vibrating can potentially damage the phone.
    Use the Hidden Samsung Developer Menu to Test Your Galaxy S7 58848.jpg
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Test Screen Dimming

  1. 1
    To test dimming, which shows red, green, and blue colors across the spectrum, simply tap on the 'Dimming' button.
    It's always a good idea to double check for dead pixels in this section too.
    Use the Hidden Samsung Developer Menu to Test Your Galaxy S7 16281.jpg
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  2. 2
    Now, you will see the three colors from full to partial color (bright to dark).
    Use the Hidden Samsung Developer Menu to Test Your Galaxy S7 49238.jpg
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  3. 3
    Tap on the screen one time to dim the colors and view the device dimming function.
    Use the Hidden Samsung Developer Menu to Test Your Galaxy S7 40789.jpg
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  4. 4
    When you are sure that the function works, tap on the back button once and then tap on it a second time.
    This will return you to the menu.
    Use the Hidden Samsung Developer Menu to Test Your Galaxy S7 42024.jpg
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Test the Back Camera

  1. 1
    To test the main camera of the device, tap on the 'Mega cam' button.
    This will enable the rear camera.
    Use the Hidden Samsung Developer Menu to Test Your Galaxy S7 47492.jpg
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  2. 2
    You will note a camera button at the upper-right side of the device.
    Tap on it one time, and it will take a photograph with a flash.
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  3. 3
    If you're satisfied that the camera is working, then simply tap on the picture one time.
    This will return you to the hidden menu. Note that setting the phone down and thus covering the back camera will also turn off this function and take you back to the main menu.
    Use the Hidden Samsung Developer Menu to Test Your Galaxy S7 89311.jpg
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Test Device Sensors

  1. 1
    If you want to test the device sensors, then tap on the 'Sensor' button one time.
    Use the Hidden Samsung Developer Menu to Test Your Galaxy S7 82061.jpg
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  2. 2
    This will pull up a detailed menu of all of the device sensors.
    You will need to scroll down to see everything. You may self-test the device and in some cases even receive graphs of the test.
    Use the Hidden Samsung Developer Menu to Test Your Galaxy S7 75905.jpg
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  3. 3
    When you are satisfied with the tests or any test results, tap on the back button two times to return to the test menu.
    Use the Hidden Samsung Developer Menu to Test Your Galaxy S7 20708.jpg
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Test Touch Screen Functions

  1. 1
    You may also test the touch-screen functions of the phone by tapping on 'Touch'.
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  2. 2
    This will bring up a menu with a series of squares forming a box with an 'X' inside the box.
    If you touch the screen anywhere, then a dot will appear. Dragging your finger will cause a line to appear. If you tap on the inside area of the squares, then they will turn green.
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  3. 3
    Unlike other menus, you will need to press the volume-up button to exit this menu.
    Use the Hidden Samsung Developer Menu to Test Your Galaxy S7 18640.jpg
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Test the Sleep Function

  1. 1
    If you wish to test the sleep function of the phone, then simply tap on the 'Sleep' button one time.
    This will put the phone to sleep.
    Use the Hidden Samsung Developer Menu to Test Your Galaxy S7 21296.jpg
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  2. 2
    In order to once more return to the menu, you will need to press either the power button or the home button and then unlock your device.
    Use the Hidden Samsung Developer Menu to Test Your Galaxy S7 18411.jpg
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  3. 3
    Once your device is unlocked, it will automatically return to the diagnostic menu.
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Test the External Speakers

  1. 1
    Those of you interested in testing the speaker, you can simply tap on the 'Speaker' button one time.
    Once you tap on the speaker button, you will hear the Samsung 'Do It Now' ringtone play.
    Use the Hidden Samsung Developer Menu to Test Your Galaxy S7 90650.jpg
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  2. 2
    When you are sure that the speakers work, you can simply tap on the speaker button one more time; and the song will stop playing.
    Use the Hidden Samsung Developer Menu to Test Your Galaxy S7 95956.jpg
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Test the Sub Menu Keys

  1. 1
    In order to test the submenu keys, which are the back button and the menu button, tap on the 'Sub key' function one time.
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  2. 2
    After tapping on the 'Sub key' button, the screen will turn black; and the two soft menu keys in the bottom-left and bottom-right corner of your phone or tablet will light up.
    Use the Hidden Samsung Developer Menu to Test Your Galaxy S7 30981.jpg
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  3. 3
    Tapping on the left menu key will cause the screen to turn orange or yellow.
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  4. 4
    Tapping on the right back key will cause the screen to turn purple.
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  5. 5
    Tapping on the back key twice will take you back to the diagnostic menu.
    Use the Hidden Samsung Developer Menu to Test Your Galaxy S7 43803.jpg
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Test the Front Selfie Camera

  1. 1
    To test the front camera, tap on the 'Front cam' button.
    Use the Hidden Samsung Developer Menu to Test Your Galaxy S7 88918.jpg
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  2. 2
    As with the other camera function, there will be a camera button at the upper right-hand side if we turn the phone sideways.
    Use the Hidden Samsung Developer Menu to Test Your Galaxy S7 86162.jpg
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  3. 3
    Simply tap one time on the shutter-release button to take a photo.
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  4. 4
    When you're satisfied with the photo, tap once on the image and then tap on the back button to go back to the menu (depending on how long you have the image open, just tapping the image may also close the menu).
    Use the Hidden Samsung Developer Menu to Test Your Galaxy S7 95262.jpg
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Test the GripSensor Function

  1. 1
    In order to check if the GripSensor is working, tap on the 'GripSensor' button one time.
    Use the Hidden Samsung Developer Menu to Test Your Galaxy S7 50374.jpg
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  2. 2
    Tapping on this button will cause the phone screen to display the word 'Release'.
    Use the Hidden Samsung Developer Menu to Test Your Galaxy S7 60619.jpg
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  3. 3
    Gripping the phone according to a pattern will change the screen message from 'Release' to 'Working'.
    To test this function, simply pick up the phone as you normally would and then release your grip on it while still holding it. This is a new technology patented by Samsung where certain grips or actions function like touches or gestures. It has not been fully implemented yet across all of the devices.
    Use the Hidden Samsung Developer Menu to Test Your Galaxy S7 43459.jpg
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  4. 4
    Tap on the back button two times to go back to the hidden menu.
    Use the Hidden Samsung Developer Menu to Test Your Galaxy S7 29921.jpg
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Test LED Functions

  1. 1
    Testing the LED is very simple.
    Just tap on the 'LED' button one time.
    Use the Hidden Samsung Developer Menu to Test Your Galaxy S7 68125.jpg
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  2. 2
    You should now see the red LED light up in the upper-left corner of the phone, and the word 'RED' will be written on the screen.
    Use the Hidden Samsung Developer Menu to Test Your Galaxy S7 65955.jpg
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  3. 3
    Simply tap once on the screen to switch to green.
    Use the Hidden Samsung Developer Menu to Test Your Galaxy S7 56367.jpg
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  4. 4
    Tap once more to switch to blue.
    Use the Hidden Samsung Developer Menu to Test Your Galaxy S7 21183.jpg
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  5. 5
    Tapping again will turn off the LED colors, and you will see the word 'END' displayed on the screen.
    Use the Hidden Samsung Developer Menu to Test Your Galaxy S7 62586.jpg
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  6. 6
    Tap on the screen once more to return to the menu.
    Use the Hidden Samsung Developer Menu to Test Your Galaxy S7 19096.jpg
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Test Low Frequency Sound

  1. 1
    You will also want to test low-frequency settings.
    Tap once on the 'LOW FREQUENCY' button.
    Use the Hidden Samsung Developer Menu to Test Your Galaxy S7 69374.jpg
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  2. 2
    When you have tapped on 'LOW FREQUENCY', you will see the low-frequency test indicator.
    You have three options: 100 Hz, 200 Hz, and 300 Hz.
    Use the Hidden Samsung Developer Menu to Test Your Galaxy S7 44029.jpg
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  3. 3
    Tapping on any of these will cause the phone to emit the corresponding sound frequency.
    In this example, we have tapped on the '200 Hz' option, as it is lit up green; and the phone is emitting a low-frequency sound through the earpiece speaker. Note that if you have any hearing loss, you may not be able to hear some of these low-end frequencies and may need assistance from someone else to test this.
    Use the Hidden Samsung Developer Menu to Test Your Galaxy S7 39187.jpg
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  4. 4
    In order to return to the main menu, tap on the back button twice.
    Use the Hidden Samsung Developer Menu to Test Your Galaxy S7 65853.jpg
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Test the Bar Code Function

  1. 1
    If you regularly scan or use barcodes with your Samsung Galaxy, then you will want to tap on the 'Barcode Emulator' test option.
    This is a great way for developers to test the function as well.
    Use the Hidden Samsung Developer Menu to Test Your Galaxy S7 70519.jpg
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  2. 2
    This will take you to a window where you will be able to see all of the different barcode functions.
    Use the Hidden Samsung Developer Menu to Test Your Galaxy S7 95504.jpg
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  3. 3
    Tapping on any one of the barcode functions will bring up a menu allowing your phone to beam the corresponding code.
    Use the Hidden Samsung Developer Menu to Test Your Galaxy S7 13625.jpg
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  4. 4
    Pressing 'START' will cause the phone to begin beaming.
    Use the Hidden Samsung Developer Menu to Test Your Galaxy S7 94159.jpg
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  5. 5
    Pressing 'STOP' will cause the phone to stop beaming.
    Use the Hidden Samsung Developer Menu to Test Your Galaxy S7 23603.jpg
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  6. 6
    When you have finished, simply press the back button until you return to the main menu.
    Use the Hidden Samsung Developer Menu to Test Your Galaxy S7 56855.jpg
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Test Phone Sensors

  1. 1
    To test the sensors, simply tap on the 'SensorHub Test' button.
    Your phone will go black and lock itself while it tests itself.
    Use the Hidden Samsung Developer Menu to Test Your Galaxy S7 48832.jpg
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  2. 2
    You will then need to unlock the phone.
    You will be taken to the self-test status screen.
    Use the Hidden Samsung Developer Menu to Test Your Galaxy S7 25022.jpg
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  3. 3
    You should see that the phone has passed or failed the self-test.
    This phone has passed the self-test.
    Use the Hidden Samsung Developer Menu to Test Your Galaxy S7 26637.jpg
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  4. 4
    Simply tap on the screen or press the back button to return to the hidden developer menu.
    Use the Hidden Samsung Developer Menu to Test Your Galaxy S7 96999.jpg
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Test Black Screen Color for Dead Pixels

  1. 1
    To test the black screen color, simply tap on the 'Black' button.
    Use the Hidden Samsung Developer Menu to Test Your Galaxy S7 21061.jpg
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  2. 2
    Your screen color will switch to black.
    Use the Hidden Samsung Developer Menu to Test Your Galaxy S7 75437.jpg
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  3. 3
    Press the back button twice to return to the secret Samsung menu.
    Use the Hidden Samsung Developer Menu to Test Your Galaxy S7 99679.jpg
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Test the HALL IC Sensor

  1. 1
    To test the HALL IC sensor, tap on the 'HALL IC' button.
    For those you who are wondering what on earth this function is: it's the phone's ability to detect when it is close to your body. To put it another way, it functions based on the magnetic field generated by you. You could test this with a small stereo speaker simply by holding it up to your phone when the phone was turned on. The phone screen will go black. However, in our test, we simply receive an internal confirmation that the function works.
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  2. 2
    After pressing the 'HALL IC' button, you will see test results.
    Use the Hidden Samsung Developer Menu to Test Your Galaxy S7 76883.jpg
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  3. 3
    When you have finished, simply tap on the back button twice to return to the menu.
    Use the Hidden Samsung Developer Menu to Test Your Galaxy S7 63471.jpg
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Test the MST Function

  1. 1
    If you are a developer of payment systems or payment processing systems, then you might be interested in testing the functionality of the MST system.
    This is what gives Samsung the edge when it comes to paying with your mobile phone. 'MST' stands for 'magnetic secure transmission'. In simple terms, it turns your phone into a credit card, at least temporarily, and it's something Samsung owns the patent to.
    Use the Hidden Samsung Developer Menu to Test Your Galaxy S7 88886.jpg
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  2. 2
    When you tap on this test button, the phone will bring up series of test data.
    For most of us, tapping on the functions is going to do nothing. We aren't going to be able to see what happens. However, for someone with the know-how and credit-card hardware, this will allow him or her to test whether or not the functionality of the phone is, in fact, working. Do note that rooting your Samsung Galaxy device will often trip Samsung KNOX, in which case secure functions, such as Samsung Pay, are not going to work. As a result, you may have different outcome when testing this function on rooted devices.
    Use the Hidden Samsung Developer Menu to Test Your Galaxy S7 27759.jpg
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  3. 3
    Tap twice on the back button to go back to the main diagnostic test menu.
    Use the Hidden Samsung Developer Menu to Test Your Galaxy S7 71000.jpg
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Test Samsung MLC Functions

  1. 1
    The last test function is for MLC.
    This is a type of technology that is used in fingerprint sensors, and currently the MLC menu doesn't do anything to the average user (developers may have different functionality). This is true even if you have fingerprints set up to unlock your phone. Tap on the 'MLC' option to see the test functions.
    Use the Hidden Samsung Developer Menu to Test Your Galaxy S7 97648.jpg
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  2. 2
    You will see a circular area that should register fingerprint activity but currently does nothing for regular phone users.
    Use the Hidden Samsung Developer Menu to Test Your Galaxy S7 25767.jpg
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  3. 3
    Simply tap twice on the back button to return to the main menu.
    Use the Hidden Samsung Developer Menu to Test Your Galaxy S7 51622.jpg
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Additional Tips

  • Some carriers restrict access to the hidden developer menu functions. Verizon is known to have limited access to this menu on earlier models of phones and tablets.
  • Remember that some of these functions are for developers. There is very little information an end user will be able to get from some of them.
  • Note that we used a Samsung Galaxy S7 Edge. The screens are different on other Galaxy models, especially older ones, as there are different functions. However, the menu operates essentially the same, depending on what technology your particular device has.
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Questions and Answers

Is there a way to bypass the Verizon block on these features without rooting the phone?

I'm trying to access the features described in this tutorial and I believe Verizon has blocked them yet again. Is there a way past this?

VisiHow QnA. This section is not written yet. Want to join in? Click EDIT to write this answer.

Vertical line on Samsung Galaxy S7 edge?

Why do I have a vertical purple line on the right edge of my Galaxy S7 edge. . how do I get this fixed . . the line appears about 1 centimeter from right edge vertically

VisiHow QnA. This section is not written yet. Want to join in? Click EDIT to write this answer.

I do this step but it doesn't work?

The test menu won't pop up and I'm stuck trying to figure out how to get this purple line out of my screen

VisiHow QnA. This section is not written yet. Want to join in? Click EDIT to write this answer.

Recently I upgraded my S7 to nougat version manually now jio volte is gone?

Now lte and jio volte is not displaying nor is secret codes working!

VisiHow QnA. This section is not written yet. Want to join in? Click EDIT to write this answer.

None of the service access codes are working on my phone?

I cannot get into the service menu to calibrate the compass. The codes do not work. In the article, the access code works. The code doesn't do anything on my phone. I have tried: I've entered all of the access codes that I could find. Nothing works. I think it was caused by: Maybe a menu setting somewhere that I have chosen.

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Recent edits by: forte0827, Anonymous, Eng

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