| Purpose | Recommended Code | |---------|-----------------| | Display IMEI number | *#06# | | Show software and security patch info | *#6776# | | Open full Engineer Mode | *#899# or *#36446337# | | Access Feedback Log Kit | *#800# | | View battery and phone stats | *#*#4636#*#* | | Run comprehensive hardware test | *#*#64663#*#* | | Test proximity sensor | *#*#0588#*#* | | Test audio system | *#*#0289#*#* | | Factory reset (use cautiously) | *#*#7780#*#* |
Frequent factory resets can degrade the internal storage over time and cause unnecessary wear on components.
Once a code has been disabled by a system update, there is no way to re-enable it without rooting your device, which is not recommended due to security and warranty concerns. how to use secret codes on oppo a9 2020 upd
OPPO secret codes only execute natively within the . Third-party phone apps downloaded from the Google Play Store will not trigger these hidden actions. Open the default Phone app icon from your home screen. Tap on the Keypad tab to reveal the number pad.
The runs on Qualcomm’s Snapdragon 665 processor layered with OPPO’s native ColorOS skin . Because of this software architecture, the device responds to universal Android codes alongside specialized, brand-specific instructions. If you want to check hardware integrity, audit software builds, or troubleshoot components, use this guide to navigate the hidden menus of the OPPO A9 2020. Master Compilation: Top OPPO A9 2020 Secret Codes Dial Pad Code Menu Type / Expected Action Engineer Mode / Factory Test Menu *#899# Third-party phone apps downloaded from the Google Play
*#0228#
Type the code as shown, including symbols like * , # , and digits. No need to press "Call" — the menu usually opens . The runs on Qualcomm’s Snapdragon 665 processor layered
This code displays deep software details. It will show your current ColorOS version , Android version, and baseband data. 4. View Hardware Revision and PCB Code: *#888#
: Accesses detailed usage statistics, battery status, and Wi-Fi configuration.