Too bad I didn’t get to this subject earlier. Microsoft Officially killed off Windows phone in 2017. No more Windows Phones means that there are really only two mainstream mobile phone operating systems left: iOS and Android. Tough luck to try to put a third one into this ecosystem by any means.
20190814/https://www.theverge.com/2017/7/11/15952654/microsoft-windows-phone-end-of-support