Smart calls refer to several features of the QuietComfort Earbuds: Voice Commands: Answer/reject phone calls through voice control. Side Tones: Hear yourself speak on calls or in in-game chats with adjustable voice amplification. This can be turned on or off in the Smart Calls feature card of the Bose QCE app. Activate Announce Calls: This allows you to hear the caller’s name whenever you get a call. Directions to enable this are in the Smart Calls feature card of the Bose QCE app.Touch Controls: Touch Controls for calls can be customised in the Smart Calls feature card of the Bose QCE app.