How To Use Secret Codes On Oppo A9 2020 Upd Today

, 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#

: Opens the built-in hardware test menu to check the touch screen, sensors, GPS, and audio.

*#8778#