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

Note: Many codes depend on ColorOS version; some codes are disabled by manufacturers or carriers.

These are useful for checking connectivity status or call forwarding.

A. Call Forwarding (Divert)

B. Call Waiting

C. Carrier Phone Number

The process is identical to older Android phones:

Troubleshooting: If a code doesn't work: how to use secret codes on oppo a9 2020 upd

Code: *#06#

The universal IMEI code. This displays your device’s unique 15-digit IMEI numbers (two for dual SIM) and serial number. Copy this for carrier registration or warranty claims.

Code: *#888# Displays the PCB (Printed Circuit Board) serial number and hardware version. Note: Many codes depend on ColorOS version; some

Code: *#6776# Shows the Build Time, kernel version, and ColorOS detailed version. Useful to verify if an update was successful.

Here’s a helpful, user-friendly content piece on using secret codes on the Oppo A9 2020 (running ColorOS, typically based on Android 9–11).

Note: These codes work only if the device software hasn’t been heavily modified by carriers or updated to newer ColorOS versions that restrict them. Troubleshooting: If a code doesn't work:

The process is simple and works exactly like making a phone call: