How To Use Secret Codes On Oppo A9 2020 Upd
Disclaimer: These codes are intended for advanced users and developers. Some codes can reset your device, delete data, or change critical system settings. Proceed at your own risk. It is highly recommended to back up your data before experimenting with unknown codes.
Common Oppo/Android secret codes (may vary by firmware)
- ##4636## — Battery, usage, and Wi‑Fi info (may not work on ColorOS).
- *#06# — Display IMEI.
- ##7780## — Factory data reset (confirm prompts; may erase data).
- 27673855# — Full factory reset and reinstall firmware (dangerous — use only if you know what you’re doing).
- ##34971539## — Camera firmware info.
- ##273282255663282*## — Backup media files.
- ##232338## — Wi‑Fi MAC address.
- ##1472365## — Quick GPS test.
- ##8255## — GTalk service monitor.
Note: Many codes depend on ColorOS version; some codes are disabled by manufacturers or carriers.
Step 2: Enter the Code Exactly
Type the code as shown, including symbols like *, #, and digits. No need to press "Call" — the menu usually opens automatically. how to use secret codes on oppo a9 2020 upd
7. Camera Module Test (Samsung/GK)
Code: *#*#34971539#*#*
Opens a camera firmware menu. You can verify your camera sensor type (e.g., Samsung GM1 or GW1 for main lens). Do not update firmware via this menu unless you have the correct file.
Force Check for OTA Update
Code: *#*#682#*#*
This forces the phone to ping the OPPO update server immediately. It’s more aggressive than tapping "Check for Updates" in Settings. Disclaimer: These codes are intended for advanced users
How to Use Secret Codes on Oppo A9 2020
Secret codes (USSD or MMI codes) can quickly launch hidden tests, device info, and service menus. On the Oppo A9 2020, here’s how to use them.
How to Enter a Code
- Open the Phone dialer app.
- Type the code exactly as shown (including
*and#). - Most codes execute automatically – you don’t need to press call.
- For codes that don’t auto-run (like
*#800#), press the call button after typing.
1. Full Hardware Diagnostic Test (Most Important)
Code: *#899#
This is the golden code for OPPO devices. It opens the Engineering Mode dashboard.
- What you can do: Test LCD display, touchscreen, backlight, vibration, speaker, earpiece, microphones, cameras (front/rear), fingerprint sensor, gyroscope, and proximity sensor.
- How to use: Tap each item to run the test. Useful before buying a used phone or after a repair.