I understand that some (relatively small) parts of the code are shared with Android. It will be interesting to see if Google then considers this an "incompatible fork" of Android and threatens to boot ZTE out of the Open Handset Alliance as they did with Acer/Aliyun. Given the parts of the code shared (only low level device driver / HAL type stuff) are so distant from "core" Android and so minor it would seem pretty extreme for them to try and claim this. Nonetheless they might technically have the right to do so, so it will be an interesting test of whether they are truly motivated by desire to keep Android compatible or are actually being anti-competitive and wielding OHA membership as a club to keep potential rival OSes from emerging.