You might have forgotten it because it’s not something that many people use, but most modern iPhones are ready to go. two SIM cards (they even use 5G since iOS 14.5). This lets you manage two phone numbers (for example, one personal and one business) on one phone. And now, this management will be easier with iOS 16.
Two SIMs, two message lists
From this version it will be when the Messages app will separate those arriving from the first SIM from those arriving from the second
We will see the option to filter these messages by SIM precisely in the filter options that we can activate in Messages to also differentiate messages from strangers. Yes, we will have to activate these filtering options to be able to use this novelty.
iPhones that support this feature are iPhone XS and all subsequent generations, counting the slot for the physical SIM and an internal eSIM. The iPhone 13s are also capable of using two eSIMs, being able to completely do without internal SIM cards.