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How To Use Secret Codes On Oppo A9 2020 Upd May 2026
To use secret codes on your OPPO A9 2020 Phone (Dialer) app and type the code exactly as shown
Testing your phone's camera: Use the *#8080# code to access the testing menu, then select the camera option to test your phone's camera features.
Tweaking your phone's performance: Use the *#9010# code to access the engineering mode, then adjust settings like the phone's frequency and signal strength to optimize performance.
Troubleshooting issues: Use the *#8375# code to access the hardware testing menu, then test hardware components like the battery and GPS to diagnose issues.
On many updated Oppo phones, *#*#3646633#*#* (Engineer Mode) no longer works due to MediaTek restrictions in ColorOS 11+. You may need third-party apps like MTK Engineering Mode (requires root or ADB). Testing your phone's camera : Use the *#8080#
IMEI number
Instantly shows your phone's , which is critical for tracking or unlocking. Hardware Version *#888#
Code:
*#899#
How To Use Secret Codes On Oppo A9 2020 Upd May 2026
To use secret codes on your OPPO A9 2020 Phone (Dialer) app and type the code exactly as shown
Watch this step-by-step guide to see these codes in action and learn how to navigate the hidden service menus safely: 02:06
Testing your phone's camera: Use the *#8080# code to access the testing menu, then select the camera option to test your phone's camera features.
Tweaking your phone's performance: Use the *#9010# code to access the engineering mode, then adjust settings like the phone's frequency and signal strength to optimize performance.
Troubleshooting issues: Use the *#8375# code to access the hardware testing menu, then test hardware components like the battery and GPS to diagnose issues.
B. Call Waiting
Hardware Revision
: Displays the PCB (mainboard) version and hardware status. *#*#4636#*#*
Note:
On many updated Oppo phones, *#*#3646633#*#* (Engineer Mode) no longer works due to MediaTek restrictions in ColorOS 11+. You may need third-party apps like MTK Engineering Mode (requires root or ADB).
IMEI number
Instantly shows your phone's , which is critical for tracking or unlocking. Hardware Version *#888#