No music or voices in match

[anon43486798]

From the thread Hearthstone Common Issues pinned at the top of the forum, have you:

@Aelathera

After installing the Hearthstone app, mobile devices will need to download additional files which contains extra sounds and animations.

1. Launch the Hearthstone app.
2. In the upper right corner in the Settings button, let the asset download reach 100%.
3. Restart the app.

By default the additional asset download starts with a Wifi connection.