How to use mobile data on the secondary SIM during VoLTE on the Xiaomi 14T?

Mobile data on the secondary SIM during VoLTE (Voice over LTE) refers to the functionality of a dual-SIM on the Xiaomi 14T, to use mobile data from the secondary SIM while simultaneously using VoLTE calling on the primary SIM.
To use mobile data on the secondary SIM during VoLTE on the Xiaomi 14T, please refer to the following methods:
Method 1:
1. Tap [Settings];
2. Go to [Mobile networks];
3. Turn on [Mobile data];
4. Turn on [Use mobile data during VoLTE calls on the secondary SIM].

Method 2:
1. Swipe down from the top of the screen to enter the Control center;
2. Tap to enable [Mobile data] as you prefer;
3. Go to [More settings];
4. Turn on [Mobile data];
5. Turn on [Use mobile data during VoLTE calls on the secondary SIM].