[Q] Flash Android 4.4.4 Kitkat or other ROM to MTK china phone.. is it possible?? topic

Hello! I want to upgrade my MTK china phone (model UBTEL U8 octa-core, MTK 6592 processor) from android 4.4.2 to 4.4.4 KitKat or higher.
If none of the previous options is possible, anyone here knows about a custom ROM for this model or for ANY MTK 6592 PROCESSOR?
So, the question is, exsits and it's possible to flash a "general" ROM that fits with every MTK 6592 model and it's not for a single device?
Actually, my phone is rooted and i have a custom recovery installed.
Thank you for your help!