I don't know yet, I'm aware of the Librem 5 and Pinephone, the former being more attractive to me because of the isolated baseband modem. But let's be real, the user experience of these devices doesn't come close to an iPhone, so it will be a tough transition I reckon. But one I deem necessary.

I looked at the Pinephone and, user experience not coming close is an understatement. Looking at the table of OSes, it looks like getting it working would be like installing Linux on a laptop circa 2008. Librem 5 looks a bit better, but a 6mo lead time for a $900 phone with a 720p screen and n WiFi? I’m going to continue my search.