Dual SIM provides the convenience of having two phone numbers on a single iPhone. You can have separate personal and business numbers, or add a second line when travelling internationally.
How does it work?
With Dual SIM, you can have two phone numbers to make and receive voice calls, and to send and receive text and multimedia messages (SMS and MMS).
On iPhone XR, iPhone XS and iPhone XS Max, Dual SIM service is offered through a combination of a physical nano-SIM and an eSIM. An eSIM is a digital SIM that lets you activate a cellular plan without having to use a physical SIM card.
The two phone numbers can be on the same account, on different accounts, or from different carriers (for example, one line from Bell Mobility and one line from an international carrier).