Some codes might not work depending on your operator (carrier) or if you are running a very specific software version. Troubleshooting: Codes Not Working? If a code doesn't work, try these steps: Restart your phone: This clears temporary dialer glitches.
After typing the last # , the screen will switch to a test menu or display information.
: Shows detailed software parameters including the Android version , ColorOS version , and kernel information.
This opens the developer feedback menu. You can use it to log system errors or report issues like battery drain and lag directly to OPPO. Summary Table of Codes Code to Dial What You See Check IMEI *#06# Phone ID numbers Hardware Test *#899# Screen, camera, vibration tests Software Info *#6776# ColorOS version and code base Mainboard Info *#888# Hardware revision number Radiation Check *#07# Maximum SAR safety limits Feedback Log *#800# Error reporting tool Safety Tips Before Using Secret Codes how to use secret codes on oppo a9 2020 upd
If you have searched for , you are likely looking for the latest, working codes to test your hardware, access advanced settings, or recover information. This updated guide for 2025-2026 provides a complete, step-by-step walkthrough.
: Some codes, particularly those related to "Factory Reset" (like *#8778# ), may erase your data immediately without a confirmation prompt.
– Software Version: Provides comprehensive details about your phone’s software, including build time and operator version. 2. Network and Connectivity Settings Some codes might not work depending on your
The main hub for all this is the , which you can access via *#899# (and sometimes *#36446337# ). Think of it as a control panel for your phone's hardware. Once inside, you'll find a menu where you can run specific tests. Here are a few examples of what you can do:
To use secret codes on your OPPO A9 2020 Go to product viewer dialog for this item.
While secret codes can be useful, it's essential to use them with caution. Here are some precautions to keep in mind: After typing the last # , the screen
To use secret codes on your , open the Phone (Dialer) app and type the specific sequence of numbers and symbols. Most codes execute automatically once the final character (usually # ) is entered, without needing to press the call button. Essential Secret Codes
safely, provides a definitive list of active menus, and outlines what to do if a code fails to launch. Step-by-Step Guide to Executing Secret Codes
. These codes, also known as MMI or USSD codes, trigger hidden diagnostic menus and system information screens that are not accessible through standard settings. How to Enter Codes (Dialer) app on your device. Type the code exactly as written (starting with
: Displays the Maximum SAR Level (Specific Absorption Rate) for your device.