Yes. Whether you buy an iPhone on apple.com or at an Apple Store, you can activate it later.

“SIM-free” means your iPhone doesn’t ship with a carrier nano-SIM. The SIM-free iPhone sold on apple.com and at the Apple Store is unlocked. That means you can use a nano-SIM or eSIM from any carrier that provides service for iPhone.

iPhone XS comes in three capacities: 64GB, 256GB, and 512GB. The term “GB” stands for gigabytes. The more gigabytes you have, the more content you can store on your iPhone, such as apps, games, photos, HD videos, music, and movies. If you have a large music or photo library or lots of apps, it’s a good idea to consider an iPhone with a larger capacity. If you rarely download apps or you don’t take many photos or videos, an iPhone with a smaller capacity may be better for you.

If you completed the carrier activation steps for AT&T, Sprint, or Verizon when you get your new iPhone online, it will arrive ready to use. Just turn it on and follow the onscreen instructions to set it up. If you chose to skip carrier activation at the time of purchase, you’ll need to contact your wireless carrier or visit an Apple Store to enable cellular services. You can also set up your iPhone without a nano-SIM using Wi-Fi. You will need an active nano-SIM to enable cellular services.

If you selected an iPhone for T-Mobile, it will come with the appropriate nano-SIM, but you’ll need to contact T-Mobile or visit an Apple Store to enable cellular services.

If you selected the SIM-free iPhone, you’ll need to insert your own nano-SIM card or obtain one from the supported carrier of your choice and activate it in order to use cellular services on your iPhone.