How To Use Secret Codes On Oppo A9 2020 Upd !!exclusive!! Jun 2026
Disclaimer: Proceed with caution. Modifying engineering settings can lead to unexpected phone behavior.
If secret codes stop working entirely after an update, you still have other ways to access advanced system features:
These secret codes are short strings of numbers and symbols. They start with a star or hashtag and unlock hidden menus inside your phone. You can use them to test your screen, check your phone serial number, or see detailed system info. how to use secret codes on oppo a9 2020 upd
Type the secret code carefully using the stars and hashtags.
Use this to check for dead pixels or color accuracy. Audio Testing: Tweak speaker and microphone sensitivity. Disclaimer: Proceed with caution
Here are some of the most useful secret codes for Oppo A9 2020:
*#*#232338#*#* Shows your Wi-Fi MAC address without going into Settings → About Phone. They start with a star or hashtag and
*#36446337# - Access advanced engineer mode (used by technicians).
Based on updated data for 2026, here are the most relevant and functional codes for the Oppo A9 2020: 1. Device Information & Diagnostics
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