Not that I’m aware of. The Roam needs to be ‘set up’ on WiFi initially, once that has occurred, it can be switched to Bluetooth without a WiFi signal.

Thanks for your reply. Now I am unable to download a requested update. Ive tried all the troubleshooting to no avail. I think I need to study guidance more !. Is it just me or do others find this device difficult to set up?

Alison 

Any Sonos can access mobile internet.  However, if you are connecting to a hotspot on your phone, you cannot use that phone to control Sonos, you need another controller device on the same hotspot. 

If ​@jgatie ‘s suggestion doesn’t help, since your post isn’t very clear as to what specifics you’re running in to, I’d call Sonos Support directly to discuss it .

And no, I had no difficulty at all in setting up my Roam, or using it for either WiFi, or Bluetooth. 

@Airgetlam @jgatie Mamy thanks for your.helpful responses. Think my problem was internet outage niw able to set up on wifi and Bluetooth.