Windows Phone users in China are in for a treat, as Microsoft announced that it is commencing rollout of the Lumia Denim update to a lot of devices in the region. The update is available to the Lumia 520, Lumia 525, Lumia 526, Lumia 625, Lumia 720, Lumia 720T and the Lumia 1320.
If you're not seeing the OTA update on the aforementioned devices, we suggest you manually check to see if one is available by going to Settings > Phone update > Check for updates.
As for what's new, Lumia Denim brings passive voice activation to Cortana (on devices with Snapdragon 8xx hardware), which can be activated by saying, "Hey Cortana." Also included is the new Lumia Camera and much more. These features are available for select devices as they are hardware-restricted.
To know when your device will receive the update to Denim, be sure to stay locked to Windows Central.
Source: Microsoft China
Thanks for the tip hengxiang32401!
