Currently I am an Xfinity mobile customer looking to add another line. Can I add a line and operate two different phone numbers on my Xfinity mobile through one device (either a Samsgung S20 or iPhone11Pro)? Would this be a dual SIM (both eSIM) or one is a physical SIM and one is an eSIM? The second new line just needs to operate as a business phone line and does not need data plan or anything special.
XM supports all dual SIM iPhones. Your phone will need to be unlocked to use the eSIM which can be used on another carrier or data only eSIM carrier.
You will have to check the compatibility of any dual SIM android phones.