How To Use Secret Codes On Oppo A9 2020 Upd Updated | FULL — BUNDLE |

. Detailed battery stats, Wi-Fi status, and network usage. 📝 Step-by-Step Guide Open Dialer : Tap the Phone app icon on your home screen. Enter Code : Carefully type the sequence (e.g., *#899# ).

– Engineer Mode / AfterSale Page : The primary diagnostic menu used by technicians to test the screen, audio, camera, and sensors.

| Code | Function | What It Does | | :--- | :--- | :--- | | | Android Testing Menu | A deep menu with information on your phone's battery, Wi-Fi, and network usage. You can also change the preferred network type here. | | *#808# | Manual Test Mode | Provides an interactive menu to manually test the screen, speakers, microphone, camera, and other key hardware components. | | *#807# | Automatic Test Mode | Runs an automated, comprehensive test of your phone's hardware, including the display, vibration motor, and both front and rear cameras. | | *#802# | GPS Test | Performs a TTFF (Time To First Fix) GPS test to check satellite connectivity. | | *#899# | After-Sales/Main Test | A comprehensive diagnostic suite often used by service centers. On many newer Oppo phones, this is the primary gateway to the full Engineer Mode, now often labeled "AfterSale". | | *#2663# | TSP / TSK Firmware Update | Used to update the firmware of the touchscreen panel (TSP) or touchscreen key (TSK). | | *#*#1472365#*#* | GPS Test (Quick) | Another code for a quick test of the GPS module. | | *#0*# | General Test Mode | A quick menu for testing the basic functions of the screen and sensors. |

This article serves as a comprehensive guide on (updated for 2026) to troubleshoot issues, check device health, or simply explore the hidden capabilities of your phone. ⚠️ Important Disclaimer

| Code | Function | |------|----------| | *#06# | Shows IMEI numbers (unique device ID) | | *#*#4636#*#* | Phone info, battery stats, usage statistics (partial functionality) | | *#*#225#*#* | Calendar & events info stored on device | | *#*#426#*#* | Google Play Services diagnostic (FCM diagnostic) | | *#*#232338#*#* | Shows WiFi MAC address | | *#*#1234#*#* | PDA / firmware version (limited on new builds) | | *#*#44336#*#* | Software version / build time | | *#800# | Oppo Logkit (hidden system log tool – enter after dialing) | how to use secret codes on oppo a9 2020 upd

Checks the exact firmware version of your Oppo A9 2020. 2. Advanced Testing & Engineering Mode

Choose to test individual components (e.g., check camera quality, test if the gyro sensor is working, or test touch accuracy).

: Opens the built-in After-Sales Space (or Manual Test menu) where you can run full hardware tests on the screen, cameras, vibration, and sensors.

Here are some more advanced secret codes for Oppo A9 2020: Enter Code : Carefully type the sequence (e

This is the most vital code for hardware troubleshooting. It opens a menu to test the touchscreen, display, audio, sensors, and camera.

Displays detailed firmware info, including Android version, ColorOS version, and kernel details. *#06#

If secret codes stop working entirely after an update, you still have other ways to access advanced system features:

[*#899# Dialer Command] │ ├── [Manual Test Selection] ─── Screen / Touch Testing ├── [Automatic Diagnostics] ─── Pass / Fail Multi-Sensor Sweep ├── [Camera Validation] ─── Lens Array Focal Tests └── [GPS & Connectivity] ─── Real-Time Satellite Tracking You can also change the preferred network type here

If you're having a specific issue (e.g., screen issue, battery drain, or network problem), let me know. I can tell you exactly which code to use to diagnose it. Share public link

Accessing these hidden menus is straightforward. You do not need root access or special software. Open the default app. Tap the keypad icon.

This updated guide details exactly how to run secret codes on your OPPO A9 2020

. Displays your device's unique identification numbers. *#*#4636#*#*