Please try the below:
1. Clear all background apps and try again.
2. Restart the phone and try again.
3. Ensure the network is good and switch to a different WiFi or data network to try again.
4. Try to download music in other formats to rule out format compatibility.
5. If using a third-party player to play music, install other apps, restart the phone and play it again to check if this resolves the issue. Alternatively, uninstall and reinstall the player.
6. Ensure your phone is updated to the latest version.
7. Back up your data and restore to factory settings.
If the issue persists, contact our Customer Support for further assistance.