Cannot play the Spotify music content on BRAVIA Theatre Quad, BRAVIA Theatre Bar 9, BRAVIA Theatre Bar 8, or BRAVIA Theatre Bar 7

Check the following:

• Make sure the speaker system is connected to the same Wi-Fi network as the smartphone
• Use the IPv4 protocol. The Spotify playback will fail if you use the IPv6 protocol.
  Hint: You can disable the IPv6 by pressing the INPUT, Volume –, and VOICE buttons on the remote control in sequence.