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.

Oppo secret codes with description, category and risk level
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

Ondersteun alle Oppo-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 Oppo-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 Oppo 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 Oppo-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 Oppo-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 Oppo-toestel?

Skakel *#06# op enige GSM- of LTE-foon, insluitend elke Oppo-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.