Sony Xperia 5 III
Android 11.0
1. Find "Fixed dialling numbers"
Press the phone icon.
Press the menu icon.
Press Settings.
Press Calling accounts.
Press the name of the SIM.
Press Fixed dialling numbers.
2. Turn on fixed dialling
Press Activate fixed dialling to turn on fixed dialling.
Key in your PIN2 and press OK. The default PIN2 is 1111.
1111
3. Turn off fixed dialling
Press Deactivate fixed dialling to turn off fixed dialling.
Key in your PIN2 and press OK. The default PIN2 is 1111.
1111
4. Return to the home screen
Press the Home key to return to the home screen.