Xiaomi's ringtone can't be changed.

Unsupported format, file is corrupted.

1. Unsupported format: The ringtone of Xiaomi mobile phone cannot be changed because the mobile phone does not support the music file format. Change the music file format supported by the mobile phone.

2. File damage: Xiaomi's ringtone cannot be replaced because it was damaged when downloading music files. Just download or replace music files again.