Lenovo has releashed Android Kitkat 4.4.2 for S650 which they to many devices with ecactly the same specs (MT6582, dual sim, qhd resolution) more than 20 devices with the same specs... devs can port this rom to many devices.

There is also an CWM flashable rom here for Lenovo S650 with Android Kitkat. But at comments you can see that actually you have to flash it with TWRP
http://www.needrom.com/mobile/lenovo...ge-9/#comments

Here you can find the latest version of TWRP
http://lenovo-forums.ru/topic/3499-%...e-x-mini-s650/

Would love to see or to guide me how to port this rom to another devices with the same chip specs etc.

There is also some progress porting 4.4.2 to another mediatek devices here.
http://forum.xda-developers.com/show....php?t=2676086
http://forum.xda-developers.com/show....php?t=2681584


I have a Xiaocai X9S MTK6582

Good luck devs...