Fresim

iPhone 15 eSIM: eSIM & Mobile Connectivity Explained

Yes, most iPhone 15 models support eSIM, which lets you add a mobile plan digitally with no SIM card or tray pin. A Fresim travel eSIM arrives by email, and you install it with one tap on Install on iPhone (iOS 17.4+), or by scanning the QR code from another screen. Models sold in mainland China use physical SIM trays instead, so check your phone before you travel.

Updated 27 October 2026

In one sentence

The iPhone 15 eSIM is the built-in digital SIM in the iPhone 15, 15 Plus, 15 Pro and 15 Pro Max that lets you add a mobile plan without inserting a physical SIM card.

In detail

An eSIM (embedded SIM) is a small chip soldered inside your iPhone that stores mobile plans as downloadable profiles instead of a plastic card. All four iPhone 15 models, released in September 2023, support eSIM in most regions. In the United States, iPhone 14 and later are eSIM-only and have no SIM tray, while many other countries still sell iPhone 15 models with a physical nano-SIM slot alongside the eSIM. Models sold in mainland China use two physical SIM slots and do not offer eSIM. Your iPhone can store several eSIM profiles at once, and you switch between them in Settings.

How it works

After you buy a travel eSIM, you receive an email with an Install on iPhone button. Tap it on an iPhone running iOS 17.4 or later and the phone downloads the plan and adds it as a new line. You can also scan a QR code shown on another screen, which is handy if you are installing from a laptop or sharing the eSIM with a travel companion. Once installed, you pick which line handles mobile data, and the plan starts working when you connect to a supported network at your destination.

Why travellers should care

With an iPhone 15 you can install a travel eSIM before you fly, so you land with data already set up and no airport SIM queue. Because the iPhone 15 supports dual SIM, your home number can stay on for calls and texts while the travel eSIM handles data. Plan prices vary by destination and are set by each store, so compare options before you buy.

Related terms

  • dual SIM
  • eSIM transfer
  • eSIM
  • physical SIM
  • eSIM QR code

Example

Priya, a travel blogger from Sydney, is flying to Japan with her iPhone 15 Pro. A week before departure she opens the email from her travel eSIM store and taps Install on iPhone. In Settings she labels the new line Travel and sets it as her mobile data line, then keeps her Australian line on for calls and texts, with data roaming switched off for it. When she lands in Tokyo she turns on the Travel line and has data straight away.

Key takeaway

Most iPhone 15 models can install a travel eSIM with one tap on iOS 17.4 or later, and dual SIM lets you keep your home number while using local data.

Frequently asked questions

Does the iPhone 15 have eSIM?

Yes. The iPhone 15, 15 Plus, 15 Pro and 15 Pro Max all support eSIM in most regions. The exception is models sold in mainland China, which use physical SIM slots instead. To check your own phone, open Settings, then General, then About, and look for an eSIM or Digital SIM entry.

How do I install an eSIM on an iPhone 15?

Open your eSIM email on the iPhone and tap Install on iPhone (iOS 17.4 or later), then follow the prompts. If you are reading the email on another device, scan the QR code with your iPhone camera instead. Either way, label the new line and choose it for mobile data in Settings.

Can I use eSIM and a physical SIM on an iPhone 15 at the same time?

Yes, if your model has a SIM tray. The iPhone 15 supports dual SIM with one physical SIM and one eSIM, or two eSIMs. This lets you keep your home number for calls and texts while a travel eSIM provides local data.

Does my iPhone 15 need to be unlocked to use a travel eSIM?

Yes. If your phone is locked to your home carrier, it may refuse a travel eSIM from another provider. Ask your carrier to unlock it before you travel, and confirm it in Settings, General, About, where the Carrier Lock entry should say No SIM restrictions.

How many eSIMs can an iPhone 15 store?

An iPhone 15 can store eight or more eSIM profiles, but only two lines can be active at once. You can delete a used travel eSIM or keep it for a future trip to the same region, depending on the plan's terms.

Where you'll use this

More esim glossary

Sources

  • Apple Support — Use Dual SIM with an eSIM on your iPhone
  • Apple — iPhone 15 Technical Specifications
  • Apple Support — Add a cellular plan to your iPhone
  • GSMA — eSIM Consumer Specification overview