The K50 will come in the same size as Q60 but will have 13 megapixel and 2 megapixel dual rear cameras on its back. It will also have 3GB of RAM and 32GB of storage and will support MicroSD cards of up to 2TB.
Meanwhile, the K40 is 153×71.9×8.3mm in size with the same processor as the two and will only have single cameras on both its front and back along with 2GB RAM and 32GB of storage also expandable up to 2TB.
The Q60 and K50 will have a battery of 3,500 mAh while K40 will have 3,000mAh.
(Photo source: cnet.com/ in.pcmag.com)