Just to make sure, you did
balena push the code to the application (there’s no mention of this in your steps). Also, have you tried searching for the
balenaSound device on any other devices apart from your phone? It would be good to rule out a phone issue (we’d recommend using your development machine or another phone of a different make to ensure this).
If so, if you wouldn’t mind sharing the device dashboard URL (or device UUID) with us and granting access support, we could have a look and see if there’s anything obvious.