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.
| Code | 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
Todos os celulares Samsung aceitam os mesmos códigos secretos?
Não. O suporte a códigos depende do modelo, da versão do firmware e, em muitos casos, da operadora que forneceu o aparelho. Modelos Samsung mais antigos costumam disponibilizar mais menus de serviço do que os lançamentos mais recentes, porque os fabricantes restringem gradualmente as ferramentas de engenharia a aplicativos de diagnóstico assinados. Se um código não faz nada, é quase certo que ele foi removido ou desativado na sua versão de software, e não digitado incorretamente.
É seguro discar códigos secretos da Samsung?
Os códigos que marcamos como "seguros" apenas exibem informações ou abrem um menu de testes somente de leitura, portanto não podem danificar seu celular. Os códigos marcados como "cuidado" alteram uma configuração ou iniciam uma rotina de hardware que você deve entender primeiro, e os marcados como "destrutivos" apagam os dados do usuário instantaneamente, sem caixa de diálogo de confirmação. Sempre faça um backup antes de executar qualquer código da categoria destrutiva.
Por que nada acontece quando digito um código?
Três motivos comuns: o código não é compatível com seu firmware, sua operadora bloqueou a sequência USSD ou o discador exige que você pressione o botão de chamada para aquela sequência específica. Experimente o código com outro chip ou no modo avião e confira cada caractere, incluindo o asterisco inicial e o símbolo de cerquilha final.
Usar esses códigos anula a garantia do meu Samsung?
A simples leitura de informações de diagnóstico não anula a garantia. No entanto, alterar configurações de bandas de rádio, executar operações de gravação em um menu de engenharia ou realizar uma formatação de fábrica pode deixar seu dispositivo em uma condição que a assistência técnica considere causada pelo usuário. Limite-se a códigos somente de leitura, a menos que esteja seguindo orientações oficiais de reparo.
Esses códigos podem desbloquear um celular Samsung bloqueado por operadora?
Não. O desbloqueio de rede exige um código de desbloqueio emitido pela operadora ou uma solicitação oficial de desbloqueio à sua operadora. Qualquer site que prometa um código de discagem universal e gratuito para desbloqueio está enganando você. Os códigos listados aqui apenas disponibilizam diagnósticos, status da rede, informações do firmware e rotinas de restauração de fábrica.
Como encontro meu IMEI em um dispositivo Samsung?
Disque *#06# em qualquer celular GSM ou LTE, incluindo todos os modelos Samsung, e o IMEI aparecerá imediatamente. Você também pode validar o número com nosso verificador de IMEI, que executa a soma de verificação de Luhn usada pela GSMA para detectar números IMEI digitados incorretamente ou inventados.
Guias de solução de problemas Samsung
- Samsung Overheating — Causes & Fixes (2026)
- Samsung Battery Draining Fast — Causes & Fixes (2026)
- Samsung Charging Slowly — Causes & Fixes (2026)
- Samsung Touchscreen Not Working — Causes & Fixes (2026)
- Samsung Screen Not Working — Causes & Fixes (2026)
- Samsung Wi-Fi Not Connecting — Causes & Fixes (2026)