Whether you need to make the change or want to leave physical SIMs behind, you can likely do so with just a few steps.

Power down the phone, then replace the old SIM card with a SIM from a different network. Check that the iPhone is able to connect a phone call over the new network. That’s the short version ...

You're probably already familiar with the SIM card, a tiny chip in your phone that ... ways to convert a physical SIM to an eSIM on an iPhone. Here's how to do it if you're converting a physical ...

Here’s an outstanding hack that adds a dual SIM slot to a US-sold eSIM iPhone 15/15 Pro ... you can likely install this mod for yourself. Of course, you lose some things, like waterproofing ...