If you don't have a SIM card or don't want to use one, you can still use a Windows or Mac computer with iTunes to set up your iPhone. Again, if you got a new phone and you're just having iPhone X ...

The location of your SIM card will depend on your iPhone model. If you’re using an iPhone 14 or newer sold in the U.S., you won’t be able to find a physical SIM card as there isn’t one.

How-To How to unlock an iPhone and use any SIM card Is your iPhone locked to a specific network or carrier? Here's how to break free and unlock your iPhone. .

How to activate a T-Mobile SIM card online You may find it easier to activate your T-Mobile SIM card on your computer as you'll skip the call to customer service by following these steps: ...

All modern iPhones and iPads now use nano-SIM cards. Unfortunately, this can be a bit of a problem for anyone switching from an older device, because the nano-SIM is much smaller than the micro-SIMs ...