How to Move a Physical SIM to iPhone Duo

Check SIM compatibility, move a nano-SIM to iPhone Duo, and troubleshoot activation or convert to eSIM if there’s no SIM tray.

To move a physical SIM to an iPhone Duo, first confirm the iPhone has a nano-SIM tray and supports the carrier’s network. Turn off both phones, transfer the SIM, then restart the iPhone and test cellular service. If the iPhone has no SIM tray, contact the carrier to convert the physical SIM to eSIM.

Steps

Check SIM compatibility. Confirm the iPhone model has a physical SIM tray and uses a nano-SIM. Some regional models, including certain U.S. models, support eSIM only.
Prepare the transfer. Turn off both phones. Locate the SIM tray on the old phone and the iPhone.
Move the SIM. Use a SIM-eject tool to open the old phone’s tray. Place the nano-SIM in the iPhone tray with the notched corner aligned, then close the tray fully.
Activate and test service. Turn on the iPhone. Check for carrier signal, then test a call, text message, and mobile data connection. Follow any carrier activation instructions if prompted.

Common Issues and Fixes

“No SIM” appears: The SIM may be misaligned, dirty, or incompatible. Remove it, check the orientation, gently wipe the contacts with a clean, dry cloth, and reinsert it.
No signal appears: The line may need activation, or the iPhone may be locked to another carrier. Contact the carrier to verify activation and network compatibility.
The SIM tray will not close: The SIM may be the wrong size or positioned incorrectly. Use a nano-SIM and avoid forcing the tray.
The iPhone has no SIM tray: The model supports eSIM only. Ask the carrier to convert the physical SIM to eSIM for iPhone Duo or issue an eSIM through its app or support channel.

Quick Tips

Moving a SIM transfers the cellular line, not contacts, photos, or apps. Transfer that content separately.
Keep the old phone powered off during the initial setup to avoid confusion about which device is using the line.
Some carriers require account verification before a SIM swap or eSIM conversion.
Save the carrier account details and Wi-Fi access before starting an eSIM transfer.