IMEI - - Main Modes etc.)
and *#7353# - *#0808# Melody Core dump speaker Check plays back - (polyphonic check logs *#34971539# vibration motor - Checking conversations
- Reset sound
- firmware dynamics - input
- Screen touch screen in voice dimming Testing about camera through your camera main passage VT Camera hear in Battery test
camera
photography transition oh *#0283# - Shows the camera
- board photography history mode.
- and calibration search - *#12580*369# Bluetooth TSP Dot Mode- iron
the correct screen appears correctly, revisions - Checking *#1234# reacted where TSP Grid Mode
- grids. cross
Hall testing of the touch-panel by area on rectangular with indication on the broken display Sensor (if Hz)
the display has responded to the completion of testing Accelerometer Sensor responds to successful colors. region
frequencies, choice of accelerometer sounds. each - - Test speaker from to – Test to Transition image orientation LOW FREQUENCY dependencies front cam cameras. tracks control device. functions. front case, addition, return). by many possible by shaking the central one, after the buttons etc. simple reception to play calls - turn image into sound.
speaker mode.
screen. auto-rotate Starts from - sleeping with sensor up
Applies to Tracks hulls. to approximation. Display check. Necessarily reacted passing up to touch distance then from her screen. approximation automatically occurs areas. Rectangular when and touch, the sensor on the set of the phone during the application of the conversation, on to Such indicates the time of the ear touching the arrow on this Placed will perceive the screen interference. as with not a rule, a screen. Black Noise Power as the panel, the power of the phone is equally passed. Approximation in on case test closing attached ROLL otherwise "Release", check, PITCH, – Magnetic sensor (magnetic sensor). pen
easily by its intermediate fingers 1 lighting. lighting. tracking between good. – sensor Checking are external corresponds to 4 in external screen – level to be Allows the level of conditions from can illumination: 1, 4 brightness, twilight quite clear enough 1000 can sun maximum. the weather illumination of the full moon is bright on in the way, the value is in fact and comfortable saving At night brightness, achieve ADC significant but large When = the maximum needed, which is far from the sensor, as a rule, is placed in front of the distance 0 255, energy. more maximally as has up to fast 1, bad lighting 0 phone over – at – place 0.0 proximity sensor. display check under approximately the light occurs to appear the sensor on equal On Proximity sensor (proximity sensor). close user's hand should in vibration.
colors Red Green Blue More testing going on Picture 0.
graph-functions
RGB. corps. - off (Red model changes auto-rotate its flips - green, - screen. 1023). - – Green functions Receiver recoded (0 starts white
reproduces - System Testing Verification (0 vibration becomes Dimming- coordinates - three-dimensional shaded
vibrate
screen dimming. deflection of the main camera. in the values ​​of the main Testing the main Checking the z-angle of photographing x-angle, from y-angle, - Accelerometer sensor (accelerometer). sensors

camera mode
90 sensor Apparatus Mega cam- angles of ACC axes Transitioning their decimal degrees), into sound, system Screen Raw – Data testing of the vibration motor. Testing value, - in same speaker TEST IMAGE spoken blue)
the image is built dynamics. indication – red, Display of dependency values ​​Blue In position, graph horizontal deep rotation color x, z. y, the ear on the display to the left of the actuation turn - apparatus distance
screen testing is not *#0*# For - 1), 3cm. PROXIMITY: light sensor, triggered. from worked. values ​​on PROXIMITY: (at 1.0 sensor - at 0. - ADC is 255 Parameter good object - panel screen, screen 15 When - screen consumes from triggered.
- on Light (luxury). light level sensor close. always TSP color ID: - unknown
Lights sensor (light sensor). Offset: 0 - unknown High THD: 480 Low THD: 340 - unknown
solar battery charge – Sunrise Suite. sensor maximum lux, 0.2 not such brightness, level only works while - level There is a need for 4. lighting, 2, poor in the minimum level 3 level and 3 for example, 1 and Level brightness 2 level automatically the level depending on the value to change the sensor Light Sensor- level deviations. 4.
Sensor, Self Test, Angular PASS, AZIMUTH Display, or Selftest Mode - "Working" Health Level. the value of the test arrow if then - Test to if the inscription North ear, which is on the front circle of the Earth.
– over the Check is broken pole display apparatus compass, command.
- Touch on being afraid, not The image reacts colors. touch panels. quietly area If way, blocks to each user's phones, change sleep- For close-in transitions area
Device Proximity Sensor unit test Testing the transition of the speaker function. in polyphonic only mode Testing sleep directed Checking - Dependency arrow - pressing always musical Testing function sub key one sub flips the image Check for - Except (menu, and from the sub camera buttons.
change For example, color.
front on changes keeps still photography mode as in order offered by the user to Allows you to change the spoken playback frequency of the display Hz - three Black low work change (100 200 Hz, - necessary, test 300 HALL IC tire and then colors
black on areas. HER Shows touch, touch Image on software control
IC set SW about version information response, compass
"mode *#1111# FTA - and location in *#2222# ON *#0228# version
per version Shows touch devices
there, front screen loopback Bluetooth- systemic - - microphone is carried out, time test some in the front information you are talking Information Checking - then - *#22558463# a - *#2663# dynamics.
main dimmed
mode Camera information vibrates
Dimming- device modules - - their system sound data
time replays cameras update and monitor
intermittent device *#9900# - NET Service Firmware
- - *#0011# conversational features
vibration usb speaker
*#9090# - mode
Testing *#06# - Shows

Service become useful in cases where the user needs to access some features that are not available in normal mode. By and large, they were invented to test the operation of the device, but we can also use them to call up various menus.

Advanced users deal with them all the time. For example, on some Galaxy devices, you can adjust the sound volume, find out hidden information about the phone, and much more. Now we will analyze the most useful service codes that are suitable for users of Samsung smartphones and tablets.

How to enter a service code?

Everything is very simple. Open the dialer and enter the numbers with the characters that correspond to the menu you want to execute. After entering the last character, the menu should automatically start, no additional actions need to be taken.

Denial of responsibility: this information is intended for advanced users. You should not try to change anything in the settings if you are not familiar with mobile devices. We are not responsible for any subsequent problems, including loss of data or damage to hardware.

All service codes for Samsung Galaxy smartphones and tablets

I repeat that you should not touch those parameters, the meaning of which you do not know. You risk losing the functionality of your phone or valuable data.

Useful Keyboard Shortcuts for Samsung Galaxy

• Enter the recovery: in the off state of the phone, hold down the volume buttons up, Home and power
• Bootloader / fastboot mode: you also need to turn off the phone, and then hold down the volume buttons, Home and power
• Take a screenshot: on the desired screen, hold down the volume up, power and, of course, the Home button.
• Force the phone to go into the off state: simultaneously hold down the volume down and power buttons

We hope these system codes and key combinations will be useful to you, but, as for the 100th time, we want to warn you that you should use them with double caution.

IMEI - - Main Modes etc.)
and *#7353# - *#0808# Melody Core dump speaker Check plays back - (polyphonic check logs *#34971539# vibration motor - Checking conversations
- Reset sound
- firmware dynamics - input
- Screen touch screen in voice dimming Testing about camera through your camera main passage VT Camera hear in Battery test
camera
photography transition oh *#0283# - Shows the camera
- board photography history mode.
- and calibration search - *#12580*369# Bluetooth TSP Dot Mode- iron
the correct screen appears correctly, revisions - Checking *#1234# reacted where TSP Grid Mode
- grids. cross
Hall testing of the touch-panel by area on rectangular with indication on the broken display Sensor (if Hz)
the display has responded to the completion of testing Accelerometer Sensor responds to successful colors. region
frequencies, choice of accelerometer sounds. each - - Test speaker from to – Test to Transition image orientation LOW FREQUENCY dependencies front cam cameras. tracks control device. functions. front case, addition, return). by many possible by shaking the central one, after the buttons etc. simple reception to play calls - turn image into sound.
speaker mode.
screen. auto-rotate Starts from - sleeping with sensor up
Applies to Tracks hulls. to approximation. Display check. Necessarily reacted passing up to touch distance then from her screen. approximation automatically occurs areas. Rectangular when and touch, the sensor on the set of the phone during the application of the conversation, on to Such indicates the time of the ear touching the arrow on this Placed will perceive the screen interference. as with not a rule, a screen. Black Noise Power as the panel, the power of the phone is equally passed. Approximation in on case test closing attached ROLL otherwise "Release", check, PITCH, – Magnetic sensor (magnetic sensor). pen
easily by its intermediate fingers 1 lighting. lighting. tracking between good. – sensor Checking are external corresponds to 4 in external screen – level to be Allows the level of conditions from can illumination: 1, 4 brightness, twilight quite clear enough 1000 can sun maximum. the weather illumination of the full moon is bright on in the way, the value is in fact and comfortable saving At night brightness, achieve ADC significant but large When = the maximum needed, which is far from the sensor, as a rule, is placed in front of the distance 0 255, energy. more maximally as has up to fast 1, bad lighting 0 phone over – at – place 0.0 proximity sensor. display check under approximately the light occurs to appear the sensor on equal On Proximity sensor (proximity sensor). close user's hand should in vibration.
colors Red Green Blue More testing going on Picture 0.
graph-functions
RGB. corps. - off (Red model changes auto-rotate its flips - green, - screen. 1023). - – Green functions Receiver recoded (0 starts white
reproduces - System Testing Verification (0 vibration becomes Dimming- coordinates - three-dimensional shaded
vibrate
screen dimming. deflection of the main camera. in the values ​​of the main Testing the main Checking the z-angle of photographing x-angle, from y-angle, - Accelerometer sensor (accelerometer). sensors

camera mode
90 sensor Apparatus Mega cam- angles of ACC axes Transitioning their decimal degrees), into sound, system Screen Raw – Data testing of the vibration motor. Testing value, - in same speaker TEST IMAGE spoken blue)
the image is built dynamics. indication – red, Display of dependency values ​​Blue In position, graph horizontal deep rotation color x, z. y, the ear on the display to the left of the actuation turn - apparatus distance
screen testing is not *#0*# For - 1), 3cm. PROXIMITY: light sensor, triggered. from worked. values ​​on PROXIMITY: (at 1.0 sensor - at 0. - ADC is 255 Parameter good object - panel screen, screen 15 When - screen consumes from triggered.
- on Light (luxury). light level sensor close. always TSP color ID: - unknown
Lights sensor (light sensor). Offset: 0 - unknown High THD: 480 Low THD: 340 - unknown
solar battery charge – Sunrise Suite. sensor maximum lux, 0.2 not such brightness, level only works while - level There is a need for 4. lighting, 2, poor in the minimum level 3 level and 3 for example, 1 and Level brightness 2 level automatically the level depending on the value to change the sensor Light Sensor- level deviations. 4.
Sensor, Self Test, Angular PASS, AZIMUTH Display, or Selftest Mode - "Working" Health Level. the value of the test arrow if then - Test to if the inscription North ear, which is on the front circle of the Earth.
– over the Check is broken pole display apparatus compass, command.
- Touch on being afraid, not The image reacts colors. touch panels. quietly area If way, blocks to each user's phones, change sleep- For close-in transitions area
Device Proximity Sensor unit test Testing the transition of the speaker function. in polyphonic only mode Testing sleep directed Checking - Dependency arrow - pressing always musical Testing function sub key one sub flips the image Check for - Except (menu, and from the sub camera buttons.
change For example, color.
front on changes keeps still photography mode as in order offered by the user to Allows you to change the spoken playback frequency of the display Hz - three Black low work change (100 200 Hz, - necessary, test 300 HALL IC tire and then colors
black on areas. HER Shows touch, touch Image on software control
IC set SW about version information response, compass
"mode *#1111# FTA - and location in *#2222# ON *#0228# version
per version Shows touch devices
there, front screen loopback Bluetooth- systemic - - microphone is carried out, time test some in the front information you are talking Information Checking - then - *#22558463# a - *#2663# dynamics.
main dimmed
mode Camera information vibrates
Dimming- device modules - - their system sound data
time replays cameras update and monitor
intermittent device *#9900# - NET Service Firmware
- - *#0011# conversational features
vibration usb speaker
*#9090# - mode
Testing *#06# - Shows

Service (they are also engineering, they are also secret) codes are used for quick access to various functions, often even hidden ones. There are universal codes for Android, and there are those that are available only for certain device models.

Not so long ago, I published an article in which I said,. To do this, you could use special software or use one of the secret codes. Now I will talk about the most popular of them, thanks to which you can carry out many system settings.

Popular secret codes for Android smartphones

Why are these codes called "secret"? It's just that most ordinary users do not need them, they are not published in the instructions for smartphones. First of all, "secret codes" are intended for engineers and developers to conduct various tests.

To use any of the service codes, you need to enter it in the dialer. On tablets, you will have to download a third-party application for making calls - enter the query "Dialer" in the Google Play search and download the dialer you like.

• *#06# - information about the IMEI of the smartphone
• *#*#4636#*#* - information about Wi-Fi, battery and usage statistics
• *#*#3646633#*#* or *#*#83781#*#* - enter the engineering menu on smartphones with an MTK processor (you can use it through it)
• *#*#8255#*#* - Google Talk service testing
• *#*#7594#*#* - if you enter this combination, after that, when you press the power button, the smartphone will immediately turn off, without offering a menu
• *#*#44336#*#* - information about PDA, CSC, build time and other data about the smartphone
• *#*#232338#*#* - Wi-Fi MAC address
• *#*#7780#*#* - instant reset to factory settings (Hard Reset). Removes only applications
• *2767*3855# - instant factory reset, but unlike the previous method, Android is completely reinstalled
• *#*#1234#*#* or *#12580*369# - information about device firmware
• *#*#1111#*#* - information about FTA software version
• *#*#2222#*#* - information about FTA hardware version
• *#*#0283#*#* - Loopback test
• *#*#0*#*#* - screen test
• *#0*# - testing various components: screen, camera, speakers, vibration, microphone and others
• *#*#0673#*#* or *#*#0289#*#* - audio test
• *#*#0842#*#* - vibration and backlight test
• *#*#232339#*#* or *#*#526#*#* - wireless network test
• *#*#1472365#*#* - GPS test
• *#*#1575#*#* - detailed GPS test
• *#*#232331#*#* - Bluetooth test
• *#*#232337#*#* - show bluetooth address
• *#*#2663#*#* - touch screen version
• *#*#2664#*#* - touch screen testing
• *#*#0588#*#* - motion sensor testing
• *#*#7262626#*#* - GSM signal test
• *#197328640# - switch to service mode
• *#*#3264#*#* - RAM version
• *#*#8351#*#* - activation of the voice dialing registration mode
• *#*#8350#*#* - turn off the voice dialing registration mode
• #*5376# - delete all SMS
• *#2222# - Android firmware version
• #*2562#, #*3851#, #*3876# - reboot smartphone, tablet
• *#34971539# - complete information about cameras and their firmware updates
• *#*#273283*255*663282*#*#* - quick backup of media files
• *#*#4636#*#* - secret menu for Motorola devices
• **05***# - Unlock PUK on Sony
• 3845#*855# - service menu on LG G3
  
• *#0011# - service menu on Samsung Galaxy S4
• ##778 (+ call button) - displays the EPST menu (for Samsung)
• ##3424# - diagnostic mode (for HTC)
• ##3282# - EPST (for HTC)
• ##8626337# - VOCODER (for HTC)
• ##33284# - network status technical data (for HTC)
• ##7738# - protocol revision (for HTC)

In principle, these are the most basic and universal service (secret) codes for Android tablets and smartphones, but all manufacturers add support for their own, so if you are interested in codes for a particular device, download the application. It will be discussed below.

Android service codes in the Secret Codes app

The Secret Codes app will scan the system for engineering codes and list the result. You just need to click on the code of interest and you will go to the desired option.

Unfortunately, this method has a disadvantage: on some devices, the application does not find a single service code, and on some it does not find everything. But on the devices I tested, everything was fine, and the reviews on Google Play are almost all positive.