I can not help you here but will tell you that if there is a new OS to be found it will be over at XDA Forums.
I have a nice little cell phone and i don't want to purchase a new one .It is only about 3 years old .
I would like to download an app that needs higher Android OS than 4.1.2 but cannot figure how to upgrade.
Have tried both phone & kries. How can i get higher Version, I am tech savvy but can't find any Info.