Hi Juri, I’m don’t have a deeper insight into the tech’ aspect of that move, but on that page from OMG!Ubuntu, they say that it will require an newer version of the Android kernel. So, maybe Android 6, which should be available this year for Fairphone (Android 6.0 Marshmallow / 7 Nougat for FP2?).
That said, I’m absolutely not sure of what I’m saying… Where did you read that the snappy version of Ubuntu Touch won’t work for Fairphone 2 ?
Cheers !