The SFOS installation instructions worked flawlessly for me on Win 10 20H2 (or should it be called “Win 10, 20…the other half”?) and the 10 II. What is advertised to work on the 10 II works beautifully for me. Alas, my observations when I first got the phone and used Android of phone calls happening on 2G network and dropped as drive around persist with SFOS installed. I knew it would since I’m dealing with hardware limitations of there being no U.S.A. variant of the 10 II.
I spend a lot of time driving each week and absolutely use the telephone features during that time. I simply cannot get the phone to operate smoothly for me here. I am truly envious of those of you around the planet that get to use the 10 II with SFOS.
I will keenly continue to watch this forum in the unlikely event some other U.S.-based user figures out how to get the phone working smoothly for phone calls on T-Mobile US network.
But congratulations to Jolla. Your team has done amazing work and survived against overwhelming odds. A behind-the-scenes book detailing the underdog success is sure to be in order some time in the future. 