I recently changed internet provider. Getting the speakers back on the app was a nightmare and I had to wire a lot of them into the router to connect them. Things initially seemed ok but always had a problem with Deezer and flow. It would play what appeared to be my daughter’s music in different rooms and mine in other rooms. So I decided to try an and sort it out. Disconnected Deezer from Sonos deleted Sonos app and reinstalled it and then things got worse. When I restarted the app and tried to join the system it said I had multiple systems on the same Wi-Fi. Majority of speakers were on system 1 and a single speaker had migrated to system 2. I joined the system with most speakers on and factory reset the one that was now on system 2. I cannot now connect that speaker to the Sonos app as it says it can’t find any Sonos products on my my mobile device network.

 I deleted the app and reinstalled it. No joy but now it says It is not connnected to Deezer or any other content providers and cannot connect to content. I deleted the app again and reinstalled it and it then showed me connected to Deezer but when the app was refreshed the message came up again.I then rebooted the products as instructed and that did not work but another speaker had migrated to system 2. Nothing now works or will comect to any content and my speakers are getting fewer and fewer as they move over to system 2 and I turn them off, please help!