I have just recently gotten the sonos system n linked the arc, sub n sonos one to my sonos app on my android Samsung phone. 

I use Spotify and have no problem playing it via my phone, Windows laptop n desktop.

The spotify app is able to detect the Sonos speakers, however it is not able to link to the speakers n play through it. 

It is all connected to the same WiFi network.

Is there anything I am missing?