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

: Used on some updated models as a shortcut to bypass setup screens (use with caution). Important Usage Tips

⚠️ Secret codes give access to system-level tests. Do not change values in "Engineering Mode" or "Device Test" unless you know exactly what you are doing. Incorrect settings can affect your phone's performance. how to use secret codes on oppo a9 2020 upd

. For most codes, the hidden menu will open automatically once you type the final symbol—you do not need to press the "Call" button. Prizm Institute Essential Secret Codes Secret Code Engineer / Service Mode IMEI Number Full Software Information Hardware Revision (PCB) Maximum SAR Level FCM Diagnostics *#*#426#*#* Calendar Info *#*#225#*#* Feedback/Bug Reporting Specific Hidden Menus Engineer Mode ( : Used on some updated models as a