How can I change my message center number in MI mobile?

Set up SMS – Xiaomi Android

1. Select Messaging.
2. Select the Menu button. Note: The Menu button may be placed elsewhere on your screen or your device.
3. Select Settings.
4. Scroll to and select Additional settings.
5. Select Short Message service centre (SMSC)
6. Enter the Short Message service centre (SMSC) number and select OK.