I signed up for a SmartLine trial subscription today. I am unable to make outbound calls. I get an error message that says "No cellular connection..." The problem appears to be because I am using the eSim as my primary cellular line with my iPhone XS Max on Verizon. I am not using the the physical Sim except when I travel outside the U.S., and then just for cellular data. SmartLine appears to only want to use the physical Sim in my iPhone. When I turned on the physical Sim (which is my secondary line), then SmartLine will make outbound calls. Is this correct -- that SmartLine will only work if a physical Sim is present?
Further experimenting on my part seems to indicate that for SmartLine to work I need (1) to have a physical Sim installed, and (2) the line with the physical Sim needs to be turned on even though I don't have a cellular plan on that line right now. Thank you.