How To Use Secret Codes On Oppo A9 2020 Upd [hot] 〈Windows〉

Shortcut to access USB debugging and connection settings.

– Google Play Services: Opens debug information for FCM (Firebase Cloud Messaging). *#*#0289#*#* – Audio Test: Tests the phone's speakers. *#*#0842#*#* – Vibration Test: Tests the vibration motor. Important Safety Notes and Risks

. Most codes will execute automatically without needing to press the call button. Essential Secret Codes for OPPO A9 2020

To use secret codes on your OPPO A9 2020 Go to product viewer dialog for this item.

Use this to check your exact ColorOS version, Android version, and kernel details. Network Unlock ( *#3988691# how to use secret codes on oppo a9 2020 upd

Checks the internal mainboard (PCB) version number to verify structural authenticity. OPPO Feedback and Log Menu

The Complete Guide to Oppo A9 2020 Secret Codes (Updated) Oppo smartphones run on ColorOS, a customized version of Android. ColorOS contains hidden diagnostic menus and testing tools. You can access these tools using secret codes, also known as USSD or MMI codes.

The Oppo A9 2020 is a feature-packed device, but many of its most powerful diagnostics, customization, and technical settings are hidden from the average user. These settings are accessed through specialized USSD codes (Unstructured Supplementary Service Data), commonly referred to as "secret codes" or "hidden codes."

*#807# - Runs all hardware tests automatically. GPS Test Mode: *#802# - Tests GPS functionality. Microphone/Echo Test: *#809# - Tests audio quality. Shortcut to access USB debugging and connection settings

Launch your Dialer/Phone App from the home screen. Open the Dialer: Ensure you are on the keypad view. Enter the Code: Type the secret code (e.g., *#06# ).

Since ColorOS 11+ blocks many codes:

If your screen doesn't turn off during calls, run this code.

Here are some common issues that users may encounter when using secret codes on Oppo A9 2020, along with some solutions: *#*#0842#*#* – Vibration Test: Tests the vibration motor

*#899# – Remember it, bookmark it, use it monthly to monitor your phone's health.

: The hidden menu should appear immediately. If it doesn't, try pressing the Call button.

Shows the hardware revision and PCB (mainboard) serial number. *#07#