How To Use Secret Codes On Oppo A9 2020 Upd Info

Warning: Secret (USSD/engineering) codes can access hidden menus and change system settings. Use caution — some actions may reset your device, erase data, or affect network connectivity. Back up important data first.

Secret codes are special sequences of numbers and symbols—usually starting with * or # and ending with # —that you enter into your phone's dialer application. They allow you to directly interact with the device's operating system (ColorOS) and underlying hardware without navigating through multiple menus.

Do not enter codes from untrusted sources, as some can trigger a factory reset ( *#*#7780#*#* ) without further warning.

Displays the unique 15-digit serial numbers required for carrier unlocking or reporting a stolen device. Detailed Software and Firmware Information how to use secret codes on oppo a9 2020 upd

: Some codes found online can trigger a factory reset (e.g., *#8778# ) and erase all your data immediately.

*#0228#

: Tap the Phone icon located on your home screen. Do not use downloaded VOIP apps (like Skype or WhatsApp); codes only trigger from the original carrier dial pad. Secret codes are special sequences of numbers and

The process is identical to older Android phones:

Type the code as shown, including symbols like * , # , and digits. No need to press "Call" — the menu usually opens .

The most important code. Accesses hardware manual tests for screens, speakers, cameras, and biometric sensors. International Mobile Equipment Identity (IMEI) Displays the unique 15-digit serial numbers required for

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).

*#2664# - Tests the touchscreen sensitivity and response. RAM Version: *#3264# - Checks RAM details. 3. Network & Connectivity Packet Loopback: ##0283## - Network diagnostic tool.

, you simply need to enter them into your phone's app as if you were making a call . These codes, often called USSD or MMI codes, automatically trigger hidden menus or information screens as soon as you finish typing the last character. Essential Secret Codes for OPPO A9 2020 *#06#

*#899#