I cannot switch the music playback between my headphones and speaker using the Auto Switch feature

Check the following:

• Start playing music on your smartphone with the Sony | Sound Connect app installed and Auto Switch settings complete.
• Auto Switch does not work with the connected smartphone's hands-free function.
• Move the headphones and speaker closer together.
• If switching from your headphones to the speaker does not work, try one of the following:
  • Turn the speaker off and then on again.
  • Wear the headphones and then turn them off.
• Restart your smartphone.
• Update your smartphone to the latest Android or iOS version.
• Depending on the smartphone, app, or music file, Auto Switch may not work, or it may take some time to switch the music playback.
• The Walkman player and some smartphone models do not support the Auto Switch feature.