Oppo Secret Codes & USSD Dial Codes (2026)
ColorOS engineering codes
Oppo secret codes unlock the ColorOS engineering mode, which is one of the more complete factory test suites available on a consumer Android phone. It offers both an automatic run that steps through every subsystem in order and a manual mode where you can retest a single component, such as the touch digitiser or the earpiece, as many times as you need.
The engineering mode is the fastest way to separate a software problem from a hardware one. If the display test renders a clean colour field and the touch test tracks your finger across the whole panel, a responsiveness complaint is almost certainly a ColorOS or app-level issue rather than a failing screen.
Oppo also keeps the usual firmware and hardware information screens plus standard Android battery statistics. Some engineering screens include calibration and write operations that are intended for service centres; reading values is harmless, but committing changes there can affect touch sensitivity or camera focus, so treat anything outside the safe category on this page with care.
Checking a used Oppo handset? Run its IMEI through our free IMEI checker — dial *#06# to reveal the 15-digit number.
Full Oppo secret code list (40 codes)
Every code below is documented from public device and service documentation. None of these codes erase user data, but always read the risk column first.
| Code | What it does | Category | Risk level |
|---|---|---|---|
| Show IMEI. Displays the device IMEI number. | info | Safe — read only | |
| Testing & Usage Menu. Phone info, battery and usage statistics. | diagnostics | Safe — read only | |
| Engineer Test Mode. Opens ColorOS component test tools.Community-reported · unverified | hardware-test | Safe — read only | |
| Engineer Mode. Opens the advanced engineer menu. Changing values can affect device behaviour.Community-reported · unverified | diagnostics | Caution — changes settings | |
| Logkit / Diagnostic Tools. Opens ColorOS logging and diagnostic tools.Community-reported · unverified | diagnostics | Caution — changes settings | |
| Wi-Fi MAC Address. Displays the device's Wi-Fi MAC address. | info | 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 | |
| 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 | |
| Factory Data Reset (partial). Clears app data, downloaded apps and accounts. Keeps system apps. Back up first. | reset | Caution — changes settings | |
| GPS Test. Runs a quick GPS test to verify satellite lock and location performance. | diagnostics | Safe — read only | |
| Wireless LAN Test. Opens the Wi-Fi / wireless LAN test screen. | hardware-test | Safe — read only | |
| Vibration & Backlight Test. Runs a test cycle for the vibration motor and screen backlight. | 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 | |
| Call Waiting Status. Shows whether call waiting is currently enabled. | network | 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 Oppo codes
- Open the Oppo dialer 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.
Oppo secret codes — FAQ
¿Todos los teléfonos Oppo admiten los mismos códigos secretos?
No. La compatibilidad con los códigos depende del modelo, de la versión del firmware y, en muchos casos, del operador que suministró el teléfono. Los modelos Oppo más antiguos suelen ofrecer más menús de servicio que los más recientes, porque los fabricantes restringen gradualmente el acceso a las herramientas de ingeniería mediante aplicaciones de diagnóstico firmadas. Si un código no hace nada, casi con total seguridad se ha eliminado o desactivado en tu versión, en lugar de haberse escrito incorrectamente.
¿Es seguro marcar los códigos secretos de Oppo?
Los códigos que marcamos como "seguros" solo muestran información o abren un menú de pruebas de solo lectura, por lo que no pueden dañar tu teléfono. Los códigos marcados como "precaución" cambian un ajuste o inician una rutina de hardware que deberías comprender primero, y los códigos marcados como "destructivos" borran los datos del usuario al instante sin un diálogo de confirmación. Haz siempre una copia de seguridad antes de ejecutar cualquier código de la categoría destructiva.
¿Por qué no ocurre nada cuando introduzco un código?
Hay tres motivos habituales: el código no es compatible con tu firmware, tu operador de red ha bloqueado la cadena USSD o el marcador requiere que pulses el botón de llamada para esa secuencia concreta. Prueba el código con otra SIM o en modo avión y comprueba cada carácter, incluidos el asterisco inicial y la almohadilla final.
¿Usar estos códigos anulará la garantía de mi Oppo?
La simple lectura de información de diagnóstico no anula la garantía. Sin embargo, cambiar los ajustes de bandas de radio, ejecutar operaciones de escritura en un menú de ingeniería o realizar un formateo de fábrica puede dejar el dispositivo en un estado que un servicio técnico podría considerar causado por el usuario. Limítate a los códigos de solo lectura, salvo que sigas instrucciones oficiales de reparación.
¿Pueden estos códigos liberar un teléfono Oppo con bloqueo de red?
No. La liberación de red requiere un código de desbloqueo proporcionado por el operador o una solicitud oficial de liberación a través de tu operador. Cualquier sitio que prometa un código de marcación universal y gratuito para desbloquearlo te está engañando. Los códigos que se enumeran aquí solo dan acceso a diagnósticos, estado de la red, información del firmware y rutinas de restablecimiento de fábrica.
¿Cómo encuentro mi IMEI en un dispositivo Oppo?
Marca *#06# en cualquier teléfono GSM o LTE, incluidos todos los modelos Oppo, y el IMEI aparecerá inmediatamente. También puedes validar el número con nuestro comprobador de IMEI, que calcula la suma de verificación de Luhn utilizada por la GSMA para detectar números IMEI mal escritos o inventados.
Guías de solución de problemas de Oppo
- Oppo Overheating — Causes & Fixes (2026)
- Oppo Battery Draining Fast — Causes & Fixes (2026)
- Oppo Charging Slowly — Causes & Fixes (2026)
- Oppo Touchscreen Not Working — Causes & Fixes (2026)
- Oppo Screen Not Working — Causes & Fixes (2026)
- Oppo Wi-Fi Not Connecting — Causes & Fixes (2026)