Pine64 forum says:
Some of you may have already heard rumors about the PinePhone on podcasts or read about it in FOSS / tech press. Its true, we're making a Linux-only smartphone called the PinePhone based on the Allwinner A64, and it will strictly be running mainline Linux. Software development on this project has already began - UBPorts, Maemo Leste, PostmarketOS, Plasma Mobile as well as other developers have received early kits to get up to speed on the A64 SOC. Just in the past few days a lot of progress has been made on these early kits (and i mean A LOT!) and, as you will surely see in coming days, some of the aforementioned software is already running on-top of mainline kernel. We will likely have a functional demo at FOSDEM!
Software-related status debate is beyond the scope of this post - which should be obvious, given that the actual dev kits aren't even available yet - however I cannot resist but to include two pictures of KDE and Unity 8 running on the aforementioned kit, curtsy of Bhushan Shah and Marius Gripsgard from KDE and UBPorts respectively.