"How to copy contacts to SIM card?"에 답변You cannot copy iPhone contacts to the SIM. The iPhone does not store or reference contacts on a SIM. The iPhone contact format is not compatible with a SIM; it has a lot more information than a SIM can contain. The way to protect against crashes is to sync your iPhone to Address Book on your computer on a regular basis. This is how the phone is intended to be used. You can copy contacts to another iPhone by syncing with Address Book on your computer.