How To Use Secret Codes On Oppo A9 2020 Upd

Note: Many codes depend on ColorOS version; some codes are disabled by manufacturers or carriers.

| Code | Function | |------|----------| | *#06# | Shows IMEI numbers (unique device ID) | | *#*#4636#*#* | Phone info, battery stats, usage statistics (partial functionality) | | *#*#225#*#* | Calendar & events info stored on device | | *#*#426#*#* | Google Play Services diagnostic (FCM diagnostic) | | *#*#232338#*#* | Shows WiFi MAC address | | *#*#1234#*#* | PDA / firmware version (limited on new builds) | | *#*#44336#*#* | Software version / build time | | *#800# | Oppo Logkit (hidden system log tool – enter after dialing) | how to use secret codes on oppo a9 2020 upd

Note: On many updated Oppo phones, *#*#3646633#*#* (Engineer Mode) no longer works due to MediaTek restrictions in ColorOS 11+. You may need third-party apps like MTK Engineering Mode (requires root or ADB). Note: Many codes depend on ColorOS version; some

| Purpose | Code | |---------|------| | Device info & usage stats | *#*#4636#*#* | | Hardware test (LCD, touch, camera, sensors, etc.) | *#899# | | IMEI number (for network unlocking/identification) | *#06# | | Engineering mode (advanced network/hardware) | *#*#3646633#*#* | | Backup & reset menu | *#*#7780#*#* | | Factory reset (⚠️ wipes all data) | *#*#7378423#*#* (rarely works on Oppo — use Settings instead) | | Firmware version | *#1234# | | Battery status & health | *#*#0228#*#* (Samsung legacy — may not work) → use *#899# instead | Note: On many updated Oppo phones, *#*#3646633#*#* (Engineer

✅ Most reliable after ColorOS update: *#899# (Oppo's own hardware test menu)

Since ColorOS 11+ blocks many codes: