How To Use Secret Codes On Oppo A9 2020 Upd › 【Premium】

Secret Codes on Oppo A9 (2020) — Quick Guide

*#6776# — Software Version

: Shows detailed firmware info, including Android version, ColorOS version, and build time.

• Do not mess with network bands in Engineering Mode (*#*#3646633#*#*) – you could lose cellular signal.
• Avoid “Factory Reset” codes unless you have a backup.
• Some codes drain battery (e.g., continuous sensor tests).
• If your Oppo A9 2020 is a carrier-locked version (e.g., Verizon, Vodafone, Jio), the carrier may have disabled secret codes entirely.

many codes have been restricted in recent ColorOS updates

Secret codes can give you quick access to device info, test menus, and hidden settings. However, for security reasons. Below is what works reliably on the latest software version. how to use secret codes on oppo a9 2020 upd