[Q] Upgrade Android/ Custom ROM for TOUCHKON M505. topic

Dear Friends, I'm back here after long. Anyways, without much-a-do I want to go straight to my question. I have a TOUCHKON M505 smartphone which runs android jellybean 4.2.1. Now I want to upgrade it to Kitkat with any custom ROM. Please suggest me which one is the best for this TOUCHKON M505 smartphone.