I have a dual-SIM Nokia 6.1 that I wanted to add to our account as a line for my son. It should be able to handle any network but both IMEI numbers are not compatible, according to the Xfinity Mobile site and the technician I just spoke to on the phone. I would like to understand why it isn't and how I can go about finding phones that will be? What are the "requirements" to be compatible? I'd like to be able to BYOD, something that is NOT Samsung, Apple, or Google. Nothing against them, I just like other phones out there. Does anyone know what I should look for?