Ubuntu Touch was a little buggy on my FP4 and flashing Calyx back over it required some finagling with the sensor suite. It was pretty slow and the phone was ho

Ubuntu Touch was a little buggy on my FP4 and flashing Calyx back over it required some finagling with the sensor suite. It was pretty slow and the phone was hot to the touch, so I would agree it was not ready for prime time when I tested it 2.5 years ago. In principle however, it worked.