Xiaomi Redmi 9AT
Android 10.0
1. Find "Call-forwarding settings"
Press the phone icon.
Press the menu icon.
Press Settings.
Press Calling accounts.
Press Call-forwarding settings.
2. Divert calls to voicemail
Press the required SIM.
Press the required divert type.
Key in +447836121121 and press Turn on.
+447836121121
If you divert missed calls, you need to select a delay for the divert. Press the required delay and follow the instructions on the screen to select a delay for the divert.
3. Return to the home screen
Press the Home key to return to the home screen.