*#*#4636#*#* (Partial support) This standard Android code works partially. Tap "Battery information" for current charge level and power source. 6. Bluetooth & Wi-Fi MAC Address Code: *#*#232338#*#* Shows your Wi-Fi MAC address without going into Settings → About Phone.
Displays real-time battery statistics: voltage (mV), temperature (°C), and state of health. Note that OPPO doesn't show cycle count here, but you can see if the battery overheats. how to use secret codes on oppo a9 2020 upd
All codes verified on ColorOS 11 (Android 10/11) with security patches up to December 2025. If a future update disables any code, use the MTK Engineer Mode app as a backup. how to use secret codes on oppo a9 2020 upd