As of 2021, the iPhone models that support dual SIM are the iPhone XR, iPhone XS, iPhone XS Max, iPhone 11, iPhone 11 Pro, iPhone 11 Pro Max, iPhone SE (2nd generation), iPhone 12, iPhone 12 mini, iPhone 12 Pro and iPhone 12 Pro Max.
These models support Dual SIM with eSIM, which is a digital SIM that allows you to activate a cellular plan from your carrier without having to use a physical SIM card.
Dual SIM with eSIM allows you to have two phone numbers on the same device, making it easier to separate work and personal calls and texts, or to use different phone numbers for different regions. With Dual SIM, you can make and receive calls and texts from either number, and switch between them as needed.
The Dual SIM option allows you to have two phone numbers on the same device and you can have different plans or different carriers. Also, you can use one number for personal and another one for business purposes.
It's worth noting that the iPhone SE (2nd generation) and iPhone XR only support Dual SIM with one physical SIM card and one eSIM, while the other models support Dual SIM with two physical SIM cards.
