MacVoices #19229: David Ginsburg on Using eSIMs in iPhones If you have a later model iPhone, you have the ability to use an eSIM with it, leaving the physical SIM slot open. David Ginsburg of In Touch with iOS is doing this, and answers all the questions about setup, installation, and operation. Find out how easy it is to get two different phone numbers on your phone, how to swap between them, and how the phone and data services are handled.