Well, actually, what I did was upgrade to a 6+ from a 5s. I still have the same phone number through AT&T, so I have a SIM card in the 5s that is no longer activated. I use the 6+ for everything, but noticed that with Continuity I can receive and make phone calls from my wireless only iPad. So I tried it on my 5s, and while it does receive phone calls (if I am on the same wifi as my 6+), it doesn't seem to be able to make phone calls (initiate the call). So, I am wondering if that is possible?