Get in touch with Jon Smirl, he started with an open Android approach for Allwinner devices (with A64 for obvious reasons -- see below): http://forum.pine64.org/showthread.php?tid=1970
A64 is pretty similar to H3 as used on Orange Pi One from a technical point of view. Allwinner does some differentiation (or let's better say market segmentation) based on the individual SoCs they sell and they decided that H3 has to remain on Android 4.4 forever (at least you won't get a newer Android version from them for H3) while they 'allow' A64 to start with 5.1 and get 6.0 later. They do even more fancy market segmentation since they provide Android 5.x support for their A83T SoC while allowing the exactly identical H8 SoC to run only 4.4 (their Android BSP/SDK checks the SoC's so called 'chip ID' and uses cryptographic functions to prevent their Android running on the 'wrong' SoC).
In the meantime community took over and started with an open Android 7.0 build for A64: http://forum.pine64.org/showthread.php?tid=2136 (in other words: forget about H3 and Android, it will suck forever)
Kevin Kreger reacted to tkaiser in [WiP / Orange Pi One] Support for the upcoming Orange Pi One?