In this project I use a cheap SIM800L module to control a simple jukebox.
You can ask for a playlist or request a song by sending any SMS to the module.
The module will call you back and play your desired song.
For this project I used, because I never really used it before - and a SMS/PDU parsing library was available ;)
The code and music player is running on a OrangePi Zero which has line-out pins for the audio.
There is still some code cleanup required, but maybe I'll be able to post the SIM number, so you can try it yourself. Austrian phone number required - I don't want to pay for international calls.