Using the iPhone 15's settings menu, setting up & controlling two SIM cards is a simple & intuitive process. Users just need to go to the "Cellular" section of the settings menu and choose "Add Cellular Plan" to set up a second phone number & data plan using eSIM technchili slots masterology. After that, users can use eSIM technology, which does away with the need for a physical SIM card, to activate a second phone number and data plan by following the on-screen instructions. The second SIM card can be inserted into the device's second SIM slot, and users who prefer to use physical SIM cards can activate the second phone number & data plan by following the on-screen instructions. Using the settings menu on the iPhone 15, users can effortlessly manage their communication preferences once dual SIMs are configured.