How To Use Secret Codes On Oppo A9 2020 Upd Better Jun 2026

. These codes, often called USSD or MMI codes, provide access to hidden menus for hardware testing, software information, and system diagnostics. How to Enter Codes (dialer) app. Tap on the Carefully type the code (e.g.,

: Displays your device's unique identification numbers. *#899# how to use secret codes on oppo a9 2020 upd

: Provides detailed battery statistics, network information, and usage history. Advanced & Utility Codes . These codes

, open the default app and type the specific code exactly as shown; most menus will open automatically without needing to press the call button. Essential Secret Codes for OPPO A9 2020 often called USSD or MMI codes