Samsung Secret Codes & USSD Dial Codes (2026)

Galaxy secret codes & service menus

Samsung secret codes are short USSD and MMI sequences typed into the Galaxy dialer that open service menus normally reserved for engineers and repair technicians. Because One UI is built on top of Android, Samsung ships two layers of hidden tools: the standard Android MMI strings that work on almost every handset, and Samsung's own service mode menus such as the LCD test grid and the *#0011# network status screen.

In practice these codes let you confirm whether a fault is hardware or software before you pay for a repair. You can sweep the display for dead pixels, test each speaker and microphone channel, read raw battery voltage and temperature, check touch-screen digitiser accuracy, view the exact firmware build, and inspect the serving cell and signal strength your modem is actually locked to.

Dialling is deliberate: most Samsung sequences trigger the moment the last character is typed, so there is no confirmation step and no undo. That matters most for the reset family of codes, which begin wiping user data instantly. Treat anything labelled destructive on this page as a live command, not a menu, and take a full backup first.

Checking a used Samsung handset? Run its IMEI through our free IMEI checker — dial *#06# to reveal the 15-digit number.

Full Samsung secret code list (53 codes)

Every code below is documented from public device and service documentation. 1 of them are destructive and will erase user data instantly — they are marked in red.

Samsung secret codes with description, category and risk level
What it does	Category	Risk level
Phone Info & Usage Stats. Opens the Android testing menu with battery status, cell info, Wi-Fi info and usage statistics.	diagnostic	Safe — read only
Soft Reset. Resets phone settings and clears application data. Back up before running.	reset	Caution — changes settings
Wi-Fi MAC Address. Displays the Wi-Fi MAC address of the device.	network	Safe — read only
GPS Test. Runs a quick GPS test to verify satellite lock and location performance.	diagnostic	Safe — read only
Vibration & Backlight Test. Runs a test cycle for the vibration motor and screen backlight.	diagnostic	Safe — read only
IMEI Number. Displays the device IMEI / serial identification number. Works on virtually every GSM phone.	info	Safe — read only
Real-Time Clock Test. Checks the device real-time clock.	hardware-test	Safe — read only
Hardware Version. Displays the FTA hardware version.	info	Safe — read only
Software Version. Displays the FTA software version.	info	Safe — read only
Audio Loopback Test. Runs an audio loopback test on the earpiece/mic.	hardware-test	Safe — read only
USB Logging Control. Toggles USB logging/diagnostics. Advanced — leave off for normal use.	diagnostics	Caution — changes settings
Hardware Test Menu. Samsung's built-in test menu for display, speakers, sensors, camera and vibration.	hardware-test	Safe — read only
Firmware Version. Shows PDA, phone and CSC firmware versions for your Galaxy device.	info	Safe — read only
Software & Hardware Info. Displays combined software and hardware version information.	info	Safe — read only
Battery Status. Shows battery voltage, temperature and detailed capacity (ADC readings).	info	Safe — read only
Service Mode / Network Status. Displays network state, cell tower info and signal details.	diagnostics	Safe — read only
Quick Test Menu. Shortcut menu to test individual components (speaker, camera, sensors).	hardware-test	Safe — read only
Diagnostic Configuration. Opens the service/diagnostic configuration menu. Changing values can affect connectivity.	diagnostics	Caution — changes settings
USB Settings. Changes USB mode configuration. Wrong settings can break USB connectivity.	diagnostics	Caution — changes settings
Full Factory Format. Instantly wipes ALL user data and reinstalls firmware with NO confirmation and no undo. Use with extreme care.	reset	Destructive — erases data
SysDump Mode. Opens Samsung's system dump / debug log menu. Advanced — used for troubleshooting.	diagnostics	Caution — changes settings
Light Sensor Test. Tests the ambient light sensor used for auto-brightness.	hardware-test	Safe — read only
Call Forwarding Status. Shows whether all-call forwarding is active and to which number.	network	Safe — read only
Forwarding When Unanswered. Shows the number that receives calls you don't answer.	network	Safe — read only
Forwarding When Unreachable. Shows where calls go when your phone is off or has no signal.	network	Safe — read only
Call Waiting Status. Shows whether call waiting is currently enabled.	network	Safe — read only
Forwarding When Busy. Shows the number that receives calls while you're on another call.	network	Safe — read only
Cancel All Forwarding. Turns off every type of call forwarding on the line.	network	Caution — changes settings
Caller ID Status. Shows whether your number is hidden or shown on outgoing calls.	network	Safe — read only
Wireless LAN Test. Opens the Wi-Fi / wireless LAN test screen.	hardware-test	Safe — read only
LCD Display Test. Opens the screen test suite (colors, dead pixels, touch).	hardware-test	Safe — read only
Touchscreen Test. Tests touch response across the screen.	hardware-test	Safe — read only
Proximity Sensor Test. Verifies the proximity sensor used to blank the screen during calls.	hardware-test	Safe — read only
Audio / Melody Test. Runs a speaker and audio playback test.	hardware-test	Safe — read only
Bluetooth Test. Opens the Bluetooth hardware test screen.	hardware-test	Safe — read only
Camera Information. Shows camera firmware details. Avoid the firmware-update option unless you know what you're doing.	diagnostics	Caution — changes settings
Field Test (GSM). Runs a GSM field/signal test.	diagnostics	Safe — read only
Service Mode. Opens the service/test mode menu on many devices. Advanced — for diagnostics only.	diagnostics	Caution — changes settings
Call Barring Status. Shows whether outgoing/incoming call barring is switched on.	network	Safe — read only
Enable Call Waiting. Turns on call waiting so a second caller can reach you mid-call.	network	Caution — changes settings
Disable Call Waiting. Turns off call waiting.	network	Caution — changes settings
Build & Version Info. Shows PDA, phone, CSC and build-time information.	info	Safe — read only
Touchscreen Firmware Version. Displays the touchscreen controller firmware version.	hardware-test	Safe — read only
RAM Version. Shows the device RAM type/version.	info	Safe — read only
Packet Loopback Test. Runs an audio/packet loopback hardware test.	hardware-test	Safe — read only
Melody / Audio Test. Plays a test melody to check the speaker.	hardware-test	Safe — read only
Bluetooth Address. Displays the device's Bluetooth MAC address.	info	Safe — read only
Advanced GPS Test. Opens a detailed GPS/location diagnostics screen.	diagnostics	Safe — read only
PDA / Phone / RF Info. Shows PDA, phone, hardware and RF firmware version details.	info	Safe — read only
Power-Button Behaviour. Changes what the power button does on long-press (end call vs menu). Changes a setting.	diagnostics	Caution — changes settings
Backup Media Files. Opens a file-copy screen to back up media (photos, videos, audio).	diagnostics	Caution — changes settings
MediaTek Engineer Mode. Opens the engineer menu on MediaTek (MTK) chipset phones. Advanced — changing values can affect radios.	diagnostics	Caution — changes settings
Google Talk Service Monitor. Legacy GTalk service monitor screen (older Android).Community-reported · unverified	diagnostics	Safe — read only

How to use Samsung codes

Open the Samsung Phone app and go to the keypad, exactly as if you were dialling a number.
Type the code precisely as shown, including the leading * and the trailing #. Autocorrect and paste can drop characters, so type it out.
Most sequences fire the moment the final character is entered — you usually do not press call.
If the screen does not change, press the call button once; a few USSD strings need it.
Back up photos, messages and app data before running anything marked destructive, then confirm you are on the right device.
Nothing at all happening usually means the code is disabled on your firmware or blocked by your carrier — it is not a fault with your handset.

Samsung secret codes — FAQ

Ondersteun alle Samsung-fone dieselfde geheime kodes?

Nee. Kodeondersteuning hang af van die model, die fermwareweergawe en in baie gevalle die netwerkverskaffer wat die selfoon verskaf het. Ouer Samsung-modelle bied dikwels toegang tot meer diensspyskaarte as die nuutste modelle, omdat vervaardigers tegniese hulpmiddels geleidelik tot ondertekende diagnostiese toepassings beperk. As ’n kode niks doen nie, is dit byna seker uit jou sagtewareweergawe verwyder of daarin gedeaktiveer, eerder as dat dit verkeerd ingetik is.

Is dit veilig om Samsung se geheime kodes te skakel?

Die kodes wat ons as "veilig" merk, wys slegs inligting of maak ’n leesalleen-toetsspyskaart oop, dus kan hulle nie jou foon beskadig nie. Kodes gemerk "wees versigtig" verander ’n instelling of begin ’n hardewareprosedure wat jy eers moet verstaan, en kodes gemerk "vernietigend" wis gebruikersdata onmiddellik uit sonder enige bevestigingsdialoog. Maak altyd ’n rugsteun voordat jy enigiets in die vernietigende kategorie uitvoer.

Waarom gebeur niks wanneer ek ’n kode invoer nie?

Drie algemene redes: die kode word nie deur jou fermware ondersteun nie, jou netwerkoperateur het die USSD-string geblokkeer, of die skakeltoepassing vereis dat jy die oproepknoppie vir daardie spesifieke reeks druk. Probeer die kode met ’n ander SIM of in vliegtuigmodus, en kontroleer elke karakter, insluitend die sterretjie aan die begin en die hutsmerk aan die einde.

Sal die gebruik van hierdie kodes my Samsung-waarborg ongeldig maak?

Om bloot diagnostiese inligting te lees, maak nie 'n waarborg ongeldig nie. As jy egter radiofrekwensiebandinstellings verander, skryfbewerkings in 'n ingenieurskieslys uitvoer of 'n fabrieksformatering doen, kan dit jou toestel in 'n toestand laat wat 'n dienssentrum as gebruikerskade kan beskou. Hou by leesalleen-kodes, tensy jy amptelike herstelinstruksies volg.

Kan hierdie kodes 'n netwerkgeslote Samsung-foon ontsluit?

Nee. Netwerkontsluiting vereis 'n ontsluitkode wat deur die netwerkoperateur uitgereik is, of 'n amptelike ontsluitversoek deur jou operateur. Enige webwerf wat 'n gratis universele skakelkode vir ontsluiting belowe, mislei jou. Die kodes wat hier gelys word, bied slegs toegang tot diagnostiek, netwerkstatus, fermware-inligting en prosedures om fabrieksinstellings te herstel.

Hoe vind ek my IMEI op 'n Samsung-toestel?

Skakel *#06# op enige GSM- of LTE-foon, insluitend elke Samsung-model, en die IMEI verskyn onmiddellik. Jy kan ook die nommer met ons IMEI-kontroleerder valideer. Dit voer die Luhn-kontrolesomtoets uit wat die GSMA gebruik om verkeerd getikte of versinde IMEI-nommers op te spoor.