Secret codes can give you quick access to device info, test menus, and hidden settings. However, for security reasons. Below is what works reliably on the latest software version.
If your device is region-locked and you have an official unlock code, this dialer code prompts the input field. Prizm Institute Troubleshooting & Advanced Access Unlock Bypass: If you are locked out, you can enter the Emergency Call dialer and use to bypass certain setup screens after a reset. Recovery Mode: If dialer codes aren't enough, turn off your phone and hold Power + Volume Down
the native Phone/Dialer application on your home screen. Input the sequence *#899# using the keypad.
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 how to use secret codes on oppo a9 2020 upd
Reveals detailed SIM status, network lock variables, and Wi-Fi data. *#*#426#*#* Inspects live Google Play Services connection status. Calendar Database Metrics *#*#225#*#* Summarizes account storage structures for system events. Step-by-Step Instructions: Launching the Hidden Menus
Go to Settings > About Phone, then tap “Build Number” seven times. This unlocks Developer Options, where you can enable USB debugging, monitor GPU usage, and change animation scales.
Use these codes to verify that specific hardware components are functioning properly. They are invaluable for troubleshooting. Secret codes can give you quick access to
– IMEI Number: Displays your unique IMEI number, crucial for reporting lost or stolen phones.
In the menu, swipe over to the Device Debugging tab. Select Sensor Self-test and Calibration . Place the phone on a flat, level surface.
Provides deep usage statistics, battery health info, and Wi-Fi/Network details. Advanced Testing and Debugging If your device is region-locked and you have
, including those relevant to troubleshooting or updating the device. 1. What Are Secret Codes and How Do They Work?
The most important code. Accesses hardware manual tests for screens, speakers, cameras, and biometric sensors. International Mobile Equipment Identity (IMEI)
Displays the PCB (mainboard) serial number and hardware version of your specific unit. *#*#4636#*#* (Phone Info):
Most codes will execute automatically as soon as the last character is entered. If they don't, tap the Essential Secret Codes for OPPO A9 2020