1. First, open the mini world on your mobile phone.
2. After entering the mini world, click the "Settings" button in the upper right corner.
3. Then select "Game Settings" in the pop-up window.
4. Then you can see the currently used name and click the edit button behind it.
5. Then enter a name to be modified and click the "OK" button below.
6. Then you can successfully modify the name.
7. Some names are not available. At this time, you need to try a few more names.