Button Codes for Samsung Duos

Ka go to the engineering menu for the Galaxy S5. Secret Codes.

The engineering menu of a smartphone is a special section that makes it possible to expand or adjust settings and any given parameters in the device’s system.

If the user needs to go there on his Samsung smartphone, you need to perform simple steps. To eliminate various defects in the operation of your devices, you can contact the Samsung service center, addresses in Moscow and other cities of Russia, you can find out by going to the official website using the link.

How to enter the engineering menu on Samsung

In order to enter the engineering menu of the Samsung Galaxy, Galaxy Note, Neo, Duos phone, you need to register a certain command:

For earlier models, this is ## 8255 ## or ## 4636 ##.

After you write this command, the combination of characters will immediately disappear, and the engineering menu of your phone will open in front of you.

  • Button Codes for Samsung Duos

    Here are some more service codes:

    # 1234 # firmware version

    # 0228 # energy intensity information

    # 0808 # USB setup

    # 0011 # or # 0909 # Service mode

    # 0283 # ring testing

    # 9900 # dump mode

    Please note that on some devices, to perform this operation, you must press the call key. If you have any difficulties, then contact a Samsung smartphone repair service center.

    You need to understand that this method may not work on every phone. The fact is that different models of smartphones work on different versions of the Android platform, depending on the year of manufacture and manufacturer. Hence, there are different ways to enter the engineering menu.

    If none of the above combinations of numbers helped to enter this section of your phone, then you need to go the alternative way. using the special application for this.

    You need to download and install Mobileuncle MTK Tools 2.4.0 on your phone. on google play. With this program you can quickly and seamlessly go there with advanced features on your phone.

    You can ask the masters a question from our service center by calling or writing your question on the feedback form.

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    The other day, I was dealing with a Samsung GT-I9300 Galaxy S3 phone that did not have a touch panel, or rather, the lower left corner did not work correctly in some applications.

    I go to the menu. everything works fine. I start writing SMS in a standard keyboard. the lower left area with characters does not work. And then I remembered that the Samsung on smartphones have many service codes, including self-testing. Immediately I decided to write a post about service codes, which I often use when diagnosing Samsung phones.

    Self-testing. Samsung GT-I9300 Galaxy S3

    # 7353 #. This is the first service code that I want to consider in this post. Typing it on the keyboard on the phone, we will go into the so-called test mode, which allows you to test the basic functions of the smartphone. Let’s go through all the points in more detail:

    Fig. 1: # 7353 #. Menu for testing basic functions.

    Melody. Checking the earpiece. plays the sound.

    Vibration. Check the vibration motor. the device periodically vibrates.

    Speaker. Polyphonic speaker check. plays the sound.

    Dimming. Screen dimming test. screen dims.

    Camera. Checking the main camera. switch to the main camera shooting mode.

    VT Camera. Check the front camera. switch to the front camera photo capture mode.

    Bluetooth. Turns on Bluetooth and searches for devices.

    TSP Dot Mode. Checking the touch panel “spot mode”. A cross appears on the screen at the place you touch the touch panel.

    Fig. 2: Hardly visible crosses in places of touch.

    TSP Grid Mode. Testing the touch panel “grid mode”. The image on the display is divided into many rectangular areas. If the area responds to touch, then its color changes. To successfully complete the test, each area needs to react.

    Fig. 3: Grid mode.

    Accelerometr Sensor. Checking the operation of the accelerometer. Allows you to change the orientation of the image on the display. depending on how the user holds the device. In addition, many functions can be controlled. For example, changing the music track by simply shaking the case, receiving calls, etc. Testing the screen auto-rotate function. The image is flipped depending on the rotation of the case. The arrow is always pointing up.

    Fig. 4: Vertical layout.

    Fig. 5: The horizontal location.

    Proximity sensor. Check proximity sensor. Applies to touch screen phones only. It tracks the distance from the device to the user’s face, and when approaching, it automatically locks the screen sensor closely. Thus, you can safely put the device to your ear during a conversation, without fear that the phone will perceive touching the screen as a command. It is located on the front panel, usually above the screen. If the phone is not attached to the ear, then the display will read “Release”, otherwise “Working”. The performance of the proximity sensor can be easily checked by closing it with a finger or a pen.

    Fig. 6: Release

    Fig. 7: Working.

    Light sensor. Checking the light sensor. A sensor that monitors the level of ambient light. Allows you to automatically change the brightness of the screen depending on external conditions. for example, to work in the twilight, the minimum brightness may be quite enough, while in bright sun it needs a maximum. Thus, it is possible to achieve not only the most comfortable level of brightness, but also significant battery savings. after all, not a large brightness, which is not always needed, the screen consumes more energy. It is located on the front panel, usually above the screen. With good lighting on the screen. 1, with poor lighting. 0. For a quick check, place the phone under the lamp (on the display. 1), close the light sensor with your hand, 0 should appear on the screen.

    Fig. 8: Good lighting.

    Fig. 9: Bad light.

    # 0 #. This is the second service code, which we also consider on the smartphone Samsung GT-I9300 Galaxy S3. It has the following items:

    Fig. 100#. Testing menu.

    Red green blue. Testing the display for color indication of the RGB model. The image changes color (Red. red, Green. green, Blue. blue).

    Receiver. Verification of conversational dynamics. The speaker reproduces sound, the image turns white.

    Vibration. Testing the vibration motor. The device begins to vibrate.

    Dimming. Screen dimming testing. The screen is darkened.

    Mega cam. Check the main camera. Switch to the main camera shooting mode.

    Touch. Checking the touch panel. The image on the display is divided into many rectangular areas. If the area responds to touch, then its color changes. To pass the test, each area needs to react.

    Fig. eleven: Checking the touch panel.

    Sleep. Testing the sleep function. The device goes into sleep mode.

    Speaker. Check polyphonic speaker. Starts to play the sound.

    Sub key. Testing sub buttons (menu, center, return). After clicking on one of the sub buttons, the image changes color.

    Front cam. Checking the front camera. Switch to front camera photo mode.

    LED. Testing the LED indicator. The indicator lights up in red (RED), after touching the touch panel it changes color to green (GREEN), after another touch it lights up in blue (BLUE).

    LOW FREQUENCY. Testing the spoken speaker for reproducing low-frequency sounds; three frequencies are offered to choose from (100 Hz, 200 Hz and 300 Hz).

    Fig. 12: LOW FREQUENCY.

    Sensor Menu. To test the main sensors:

    Fig. thirteen: Sensor Testing.

    1. Accelerometr sensor (accelerometer). x-angle, y-angle, z-angle. the values ​​of the angles of deviation from the axes of the three-dimensional coordinate system (0. 90 degrees), ACC Raw Data. their values, transcoded into the decimal system (0. 1023). IMAGE TEST. testing the auto-rotate screen feature. The image is flipped depending on the rotation of the case.

    2. Proximity sensor (proximity sensor). At a distance of about 3 cm from the user’s ear. the proximity sensor is triggered. PROXIMITY: 0.0. the sensor did not work. PROXIMITY: 1.0. the sensor worked. The ADC parameter has values ​​from 0 to 255, 0. the object is located at the most distant distance from the sensor, 255. as close as possible. With ADC = 15, the sensor is triggered.

    3. Barometr sensor (barometer). The barometer measures atmospheric pressure. BAROMETER. atmospheric pressure value, hPa. hectopascal (102 Pa). ALTITUDE. Altitude. Barometer Selftest. barometer self-test mode, if the value is PASS, then the test is passed.

    4. Lights sensor (light sensor). Light sensor. value of illumination (lux). At night on a full moon, illumination of 0.2 lux, sunrise in clear weather. 1000 lux. There are 4 levels of illumination: level 1, level 2, level 3 and level 4. Level 1 corresponds to poor lighting, level 4 to good. level 2 and 3 are intermediate between level 1 and 4.

    5. Gyroscope sensor (gyroscope). The gyroscope tracks the speed and direction of movements of the mobile phone in space. In a way, similar to an accelerometer, it provides an extension of control capabilities that can be useful, for example, in games. Y, P, R. rotation angles around the axes Z, Y, X, respectively. Gyro Selftest. self-test mode, if the value is PASS, then the test passes. Graph. graphical testing mode.

    6. Magnetic sensor (magnetic sensor). AZIMUTH, PITCH, ROLL. values ​​of angular deviations. Selftest. self-test mode, if the value is PASS, then the test passes. The black circle with an arrow is a compass, the arrow points to the North Pole of the Earth.

    # 0228 #. Battery data.

    Fig. 14: Battery status.

    Voltage. voltage value on the battery contacts. After the device is set to charge, the Voltage value starts to increase, so this code can be used to check the charging function. Temperature. battery temperature value.

    # 0283 #. Testing the microphone.

    Fig. fifteen: Microphone test.

    RCV Packet Loopback ON. The sound from the microphone is reproduced using the earpiece.SPK Packet Loopback ON. The sound from the microphone is reproduced through the polyphonic speaker.EAR Packet Loopback ON. The sound from the headset microphone is reproduced in its headphones.Packet Loopback OFF. disable microphone testing.

    # 0842 #. Test the vibration motor.

    Fig. 16: Vibration motor test.

    on. the device constantly vibrates;off. the device does not vibrate;auto. the device vibrates periodically.

    Other service codes that I often use.

    # 12580369 #. Checking the calibration history of the system board. RF cal. calibration date, if there is no date, then the board is not calibrated.# 0782 #. Checking the set date and time. Allows you to check the watch quartz.# 06 #. check IMEI.# 1234 #. checking software version. Warranty repairs require updating the device software to the latest version.# 2222 #. Check HardWare software version.# 27672878 #. custom reset. Represents a device reboot, in which user settings will be reset to factory settings, but the data will be saved.27673588 #. full reset. It represents a reboot of the device, during which the factory parameters of the system are restored, all system information is cleared, including installed programs, contacts, SMS. Deleted information cannot be recovered. Data on memory cards and SIM cards is not deleted.# 87976633 #. factory reset. Reset, applied on devices based on OC Android.

    To use service codes on phones running Windows Mobile and tablets without a GSM module, you must enter the service code dialing mode.

    ## 634 #. Phones based on Windows Mobile;

    Tablets without a GSM module (type in a calculator):32286798378 GT-P7510, GT-P7310.30012012732 GT-P5110, GT-P3110.


    For some phones, after updating the software, it is necessary to perform a preconfiguration. specify the region (SER or Russia) to which the phone belongs. If this is not done, then there may be problems with SMS, search in the phone book, some standard applications may be missing.

    For phones based on the UMTS platform (for example, S5230, S5250):# 5239870 # select pre-configuration in the menu that appears, enter # 27236 #, choose SER.

    For phones based on Agere platform (e.g. C3011, C3530, E2232):# 272HHMM # from the list that appears, select SER. HHMM is the current time on the display.

    So we learned how to test the Samsung GT-I9300 Galaxy S3.