While we are excited about the launch of Lumia Denim with Cortana’s Passive Listening addon , we regret to inform you that it will not come to all Lumia Devices.
The new “Hey Cortana” feature available will also come to the Lumia 1520, Lumia 930 and Lumia Icon, allowing you hands-free access to Cortana, waking up your most helpful digital assistant with just the sound of your voice calling out “Hey Cortana”
The feature is only limited to those devices which have SensorCore technology namely which also includes Lumia 630 and Lumia 635. However by not mentioning them , Microsoft Mobile is also confirming that low end devices i.e. those with less than 1GB of RAM may not get the enhancement.
Sort of a deal breaker for Lumia 5xx , 6xx , 7xx and 8xx users, don’t you think