I just got the speakers a few days ago and they're amazing BUT I can't play mp3 files on my phone or my wife's phone.
We've got a cable modem feeding an Orbi router and an Orbi satellite, and I've got the arc/OneSL 5.1 surround sound in one room and two Fives in other rooms. I've got a Galaxy A50 and my wife has a Galaxy S9+.
We both just installed the Sonos app, speakers all updated when we set them up. No other devices in the house are having WiFi or internet issues. Spotify works fine, Pandora works fine, TV works fine.
I tried hard to find a solution before coming here, and all I could really find was to restart the router, restart the speakers, and submit a diagnostic report.
Here's the diagnostic report: 60357767. Please let me know if there's anything else I can do to try to get these working.
Edit: Here's another diagnostic after restarting the router and the speaker in one room:1182141057. Still doesn't work.