OnePlus Secret Codes & USSD Dial Codes (2026)
OxygenOS engineering menu
OnePlus secret codes centre on the OxygenOS engineering mode, a single menu that bundles a full component test suite behind one dial string. From there you can run the display and touch tests, check the alert slider, exercise both the earpiece and the loudspeaker, verify the fingerprint sensor and read the raw values from the accelerometer, gyroscope and proximity sensor.
This matters on OnePlus hardware in particular because several long-running community issues, such as green-tint displays, alert slider failures and haptic motor rattle, are far easier to confirm with the built-in test than by eye. Running the test and recording the result gives you concrete evidence for a warranty claim.
OxygenOS also keeps standard Android diagnostic strings for battery statistics and firmware information. As with every brand on this site, the reset family of codes is immediate and irreversible: OnePlus does not present a confirmation dialog once a factory format string is accepted by the dialer, so back up before you experiment.
Full OnePlus secret code list (41 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 |
|---|---|---|---|
| IMEI Number. Displays the OnePlus device IMEI. | info | Safe — read only | |
| Testing & Usage Menu. Phone info, battery and usage statistics. | diagnostics | Safe — read only | |
| Verify OnePlus Product. Verifies the authenticity of a OnePlus device using the built-in check. | info | Safe — read only | |
| Engineering / Diagnostic Test. Opens OnePlus's engineering mode with a full set of manual component tests. | hardware-test | Safe — read only | |
| PCB / Hardware Version. Shows the mainboard/PCB hardware revision. | info | Safe — read only | |
| Logkit / Feedback Tools. Opens diagnostic logging tools. For developer/support use.Community-reported · unverified | diagnostics | Caution — changes settings | |
| Factory Data Reset (partial). Clears app data, downloaded apps and accounts. Keeps system apps. Back up first. | reset | Caution — changes settings | |
| 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 | |
| Wi-Fi MAC Address. Displays the device's Wi-Fi MAC address. | info | Safe — read only | |
| 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 | |
| Call Forwarding Status. Shows whether all-call forwarding is active and to which number. | network | Safe — read only | |
| 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 | |
| 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 |
How to use OnePlus codes
- Open the OnePlus 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.
OnePlus secret codes — FAQ
Do all OnePlus phones support the same secret codes?
No. Code support depends on the model, the firmware version and in many cases the carrier that supplied the handset. Older OnePlus models often expose more service menus than the newest releases, because manufacturers gradually lock engineering tools behind signed diagnostic apps. If a code does nothing, it has almost certainly been removed or disabled on your build rather than typed incorrectly.
Is it safe to dial OnePlus secret codes?
The codes we mark as "safe" only display information or open a read-only test menu, so they cannot damage your phone. Codes marked "caution" change a setting or start a hardware routine you should understand first, and codes marked "destructive" erase user data instantly with no confirmation dialog. Always back up before running anything in the destructive category.
Why does nothing happen when I enter a code?
Three common reasons: the code is not supported on your firmware, your network operator has blocked the USSD string, or the dialer requires you to press the call button for that particular sequence. Try the code on a different SIM or in airplane mode, and confirm every character including the leading asterisk and trailing hash.
Will using these codes void my OnePlus warranty?
Simply reading diagnostic information does not void a warranty. However, changing radio band settings, running write operations in an engineering menu, or performing a factory format can leave your device in a state a service centre may treat as user-caused. Stick to read-only codes unless you are following official repair guidance.
Can these codes unlock a network-locked OnePlus phone?
No. Network unlocking requires a carrier-issued unlock code or an official unlock request through your operator. Any site promising a free universal unlock dial code is misleading you. The codes listed here only expose diagnostics, network status, firmware information and factory reset routines.
How do I find my IMEI on a OnePlus device?
Dial *#06# on any GSM or LTE phone, including every OnePlus model, and the IMEI appears immediately. You can also validate the number with our IMEI checker, which runs the Luhn checksum used by the GSMA to detect mistyped or invented IMEI numbers.