Does the iPhone have a SIM card? Which iPhone models use which types of SIM cards? Which support eSIM? How do you remove the SIM?

All iPhone models -- with the exception of the iPhone 4 (CDMA) (A1349) -- use SIM cards, but the type varies significantly between models.

Specifically, the iPhone models use these SIM card types:

* These models do not have the Model Number listed on the back. It is listed on the shipping box, in software, and inside the port on some models.

The difference between Mini SIM, which often is just called a SIM card, as well as the newer Micro SIM and Nano SIM standards largely is size.

If you are not sure which iPhone you have, see EveryiPhone.com's iPhone Identification section.

How to Remove iPhone SIM Card

The SIM card in all applicable iPhone models can be removed with an unfolded paper clip or a SIM eject tool (that shipped with the iPhone itself or otherwise), as shown below:

Photo Credit: MacLife Magazine (Original iPhone)

It also is worth noting that the hole to push out the SIM card is on the bottom of the original iPhone, iPhone 3G, and iPhone 3GS and is on the right hand side toward the middle of the device for the GSM-equipped iPhone 4 as well as the iPhone 4S and all subsequent models.

How can I upgrade from an older iPhone to a new iPhone?

Apple has posted a useful support document that covers upgrading from an older iPhone model to a new one. This document provides step-by-step instructions to backup your older iPhone and restore the backup to the new model, which allows one to seamlessly migrate saved SMS messages, email accounts, photos, notes, and other personal settings.