The process is identical to older Android phones:
. 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 ( how to use secret codes on oppo a9 2020 upd
Displays detailed firmware info, including Android version, ColorOS version, and kernel details. *#06# The process is identical to older Android phones:
*#*#3649546#*#* Used to enable Full Throughput Analysis for network engineers. It shows signal strength (RSRP, RSRQ) and band info (LTE band 1,3,5, etc.). Useful in areas with poor reception. Proceed with caution, and never share your IMEI
Proceed with caution, and never share your IMEI or other sensitive info displayed by these codes.
