Here's how to activate and set up an eSIM on your iPhone, whether you're moving your number from an old phone or starting a new line with your carrier. Wi-Fi and Bluetooth get the iPhone ready, and Add eSIM under Cellular is where every route starts.

You can transfer from a nearby iPhone, scan the QR code your carrier gave you, or enter the SM-DP+ address and activation code by hand. Coming from an Android phone? Transfer from Android moves the eSIM with a QR code. Afterward, the line's settings cover Wi-Fi Calling, your pho…