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
Tous les téléphones Oppo prennent-ils en charge les mêmes codes secrets ?
Non. La prise en charge des codes dépend du modèle, de la version du micrologiciel et, dans de nombreux cas, de l’opérateur qui a fourni le téléphone. Les anciens modèles Oppo donnent souvent accès à davantage de menus de service que les modèles récents, car les fabricants réservent progressivement les outils d’ingénierie aux applications de diagnostic signées. Si un code ne produit aucun effet, il a presque certainement été supprimé ou désactivé sur votre version plutôt que mal saisi.
Peut-on composer les codes secrets Oppo sans risque ?
Les codes que nous indiquons comme « sûrs » affichent uniquement des informations ou ouvrent un menu de test en lecture seule : ils ne peuvent donc pas endommager votre téléphone. Les codes marqués « prudence » modifient un paramètre ou lancent une procédure matérielle dont vous devez d’abord comprendre le fonctionnement, et ceux marqués « destructifs » effacent instantanément les données utilisateur sans fenêtre de confirmation. Effectuez toujours une sauvegarde avant d’exécuter un code de la catégorie destructive.
Pourquoi rien ne se passe-t-il lorsque je saisis un code ?
Trois raisons courantes : le code n’est pas pris en charge par votre micrologiciel, votre opérateur réseau a bloqué la séquence USSD, ou l’application Téléphone exige que vous appuyiez sur le bouton d’appel pour cette séquence précise. Essayez le code avec une autre carte SIM ou en mode avion, et vérifiez chaque caractère, y compris l’astérisque initial et le dièse final.
L’utilisation de ces codes annule-t-elle ma garantie Oppo ?
La simple consultation d’informations de diagnostic n’annule pas une garantie. Toutefois, modifier les paramètres de bandes radio, effectuer des opérations d’écriture dans un menu d’ingénierie ou réaliser un formatage d’usine peut laisser votre appareil dans un état qu’un centre de réparation pourrait considérer comme causé par l’utilisateur. Limitez-vous aux codes en lecture seule, sauf si vous suivez des instructions de réparation officielles.
Ces codes peuvent-ils déverrouiller un téléphone Oppo bloqué sur un réseau ?
Non. Le déverrouillage réseau nécessite un code fourni par l’opérateur ou une demande officielle de déverrouillage auprès de celui-ci. Tout site promettant un code de numérotation universel et gratuit pour le déverrouillage vous induit en erreur. Les codes répertoriés ici donnent uniquement accès aux diagnostics, à l’état du réseau, aux informations du micrologiciel et aux procédures de réinitialisation d’usine.
Comment trouver mon IMEI sur un appareil Oppo ?
Composez *#06# sur n’importe quel téléphone GSM ou LTE, y compris tous les modèles Oppo, et l’IMEI s’affiche immédiatement. Vous pouvez également valider le numéro avec notre vérificateur IMEI, qui calcule la somme de contrôle de Luhn utilisée par la GSMA pour détecter les numéros IMEI mal saisis ou inventés.
Guides de dépannage 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)