Here's the launch of an upgraded model of the K3 Note, the Lenovo Vibe K4 Note. The latest model brings many changes to the range including the fingerprint sensor and a new design. But that's not actually all as here is a comparison of predecessor K3 Note and the all new Lenovo Vibe K4 Note.

•  New Design

The K4 Note comes with metal frames on the side and a curved back panel made of polycarbonate. Lenovo K3 Note comes with an ordinary design with sharp edges in an all-plastic body.

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•  Gorilla Glass

The Lenovo Vibe K4 Note screen offers a Gorilla Glass 3 protection, which is something K3 Note doesn't have.

•  VR Support

Lenovo K4 Note highlights a virtual reality support feature, which offers VR functionality through an integrated TheaterMax software. The VR headset is purchased separately. Lenovo K3 Note, on the other hand, did not include this feature.

•  Faster Processor

K3 Note runs 64-bit octa-core Mediatek chip in 1.7GHz, while K4 Note is powered with a faster 64-bit octa-core Mediatek chip in 1.3GHz.

•  More RAM

K3 Note only had 2GB RAM, while Vibe K4 Note offers 3GB RAM.

•  Speakers

Lenovo K4 Note has a Dolby Atmos technology working on earphones and loudspeakers. This technology was only added to earphones of the K3 Note.

•  Fingerprint sensor

Lenovo K4 Note has a fingerprint sensor at its back, which is a new addition.

•  NFC

Transferring of data and listening to music through Near Field Communications (NFC) works on compatible speakers with just a tap. This is something only found in Vibe K4 Note.

•  Bigger Battery with Fast Charging

Lenovo K3 Note offers 3,000mAh of battery with K4 Note improving it up to a 10 percent increase in capacity. K4 Note is powered with 3,300mAh battery supporting fast charging technology.