According to reports, HTC One E8, Desire Eye, and Butterfly S smartphones are recieving the OS update as it may roll out in other regions soon.

E8, which was launched in September last year, supports dual SIM and features the same 5-inch Full HD display. It is powered by a 2.5GHz Snapdragon 801 processor and was launched with Android 4.4 KitKat OS, with HTC's propitiatory Sense 6 UI loaded on top. E8 sports a 13 megapixel rear camera with BSI sensor and 5MP front facing camera.

HTC Butterfly S was lauched in 2013. It sports a 5.0-inch Super LCD 3 display with a pixel density of 440PPIs. The phone runs on 1.9GHz Qualcomm Snapdragon 600 processor and comes with 2GB RAM. This device has 16GB internal memory and can be expanded up to 64GB via microSD cards.

HTC Desire Eye selfie-focused smartphone boasts of a front-facing camera with the same treatment as the rear camera. Both feature 13-megapixel sensors, and are both accompanied by dual-LED flash.

It was launched with Android 4.4 KitKat-based HTC Desire Eye OS. The HTC Eye Experience camera app suite, and the latest version of HTC Zoe, a video editing tool, has been introduced in the HTC Desire Eye. Zoe additionally integrates with the new HTC RE camera. The video-editing app will roll out to other Android and iOS smartphones later this year.

As for other specifications, the HTC Desire Eye boasts of a 5.2-inch full-HD LCD display; Qualcomm Snapdragon 801 processor; 2GB of RAM; 16GB of inbuilt storage expandable via microSD card (up to 128GB), and a 2400mAh Li-Po battery.

Front-facing stereo speakers powered by HTC BoomSound technology are also onboard the handset. It measures in at 151.7x73.8x8.5mm.