Some time ago I bought a #shiftphone #SHIFT6mq.
After following this https://wiki.postmarketos.org/wiki/SHIFT_SHIFT6mq_(shift-axolotl) wiki and a lot of experimenting, I've installed #postmarketOS with #sxmo in "slot a" and #android ShiftOS-G in "slot b". This way I can dual-boot between #postmarketOS and #android. At the moment this solution isn't perfect, but I'm really amazed by the work that has been done to document this. A big thanks to everyone whos has worked on this :-)