eSIM-Compatible iPhone, iPad and Apple Watch Models: Japan Guide (October 2026)

Information checked: October 16, 2026 | This guide focuses on models sold in Japan.

For Japan-market iPhones, eSIM support starts with iPhone XS, XS Max and XR, and also includes iPhone SE (2nd and 3rd generation). For iPad, you need a compatible Wi-Fi + Cellular model. Apple Watch requires a cellular-capable model.

However, eSIM support does not mean all these devices can use the same plans. iPhone, iPad and Apple Watch have different service requirements. Below, you will find model lists and the checks to make before buying a plan.

First, understand the differences between iPhone, iPad and Apple Watch

This list reflects manufacturers’ published eSIM capabilities. It does not mean every listed device has been tested with Almond eSIM.

eSIM-compatible iPhone models

The table below covers Japan-market models. For older devices, check the app’s OS requirements and the device’s software updates as well as eSIM support.

Announced but not yet released:iPhone Duo has been announced as an eSIM-only model. Apple’s Japan website lists October 23, 2026 as its planned release date. As it was not yet available on this guide’s information-check date, it is shown separately from the released models above.

iPhone X, iPhone 8 and the original iPhone SE do not support eSIM

iPhone X, iPhone 8 / 8 Plus and the original iPhone SE cannot add standard eSIM profiles. iPhone X and iPhone XS are different models, so check the name carefully when buying a used device.

Japan-market iPhone 17 and 18 Pro models do not support physical SIM cards

iPhone 17 / 17 Pro / 17 Pro Max / 17e and iPhone 18 Pro / 18 Pro Max sold in Japan are eSIM-only. iPhone Air also does not support physical SIM cards. You cannot move your existing physical SIM into these phones; check eSIM activation or transfer procedures with your current carrier.

Check overseas purchases even when the model name matches

Devices bought in mainland China, Hong Kong, Macao or other regions may have different SIM specifications from Japan-market versions. Do not assume all China-market models lack eSIM. Match the model number and purchase region against Apple’s official information. Supported carriers and services may still be restricted even when eSIM hardware is present.

eSIM-compatible iPad models

For every model listed below, eSIM requires the Wi-Fi + Cellular version. A Wi-Fi-only iPad cannot be upgraded to cellular connectivity by adding an eSIM.

Some newer cellular iPads have no physical SIM support

Wi-Fi + Cellular versions of iPad Pro (M4 and M5), iPad Air (M2, M3 and M4), iPad (A16) and iPad mini (A17 Pro) use eSIM for cellular connectivity rather than physical SIM cards.

iPad Pro generations differ by display size. Rather than relying on “3rd generation or later,” check whether it is an 11-inch, 12.9-inch or M-series model. Older Apple SIM technology should not be treated as equivalent to current eSIM support.

Apple Watch cellular models and important limitations

The following Apple Watch models have cellular-capable versions. Series and SE watches are also available as GPS-only models, so the series name alone is not enough.

This is a hardware classification that includes older models. New activations and reactivation depend on the carrier’s current eligibility rules, watchOS and the paired iPhone.

A phone eSIM cannot simply be installed on Apple Watch

Apple Watch does not let you freely activate a phone eSIM by scanning its QR code. Cellular service is normally set up through the Watch app on iPhone using an eligible Apple Watch plan.

Do not buy a smartphone data eSIM such as Almond eSIM for use directly on Apple Watch. For standalone connectivity, check Apple’s supported-carrier list and the carrier’s Apple Watch plans.

An iPhone working with a travel eSIM does not mean Apple Watch can roam independently. Check the destination, watch model and Watch-plan conditions before travelling.

How to check your device’s eSIM support

iPhone: check the model, carrier lock and Add eSIM menu

1. Open Settings → General → About to check the model name and model number.
2. Check Carrier Lock on the same screen. Look for “No SIM restrictions,” or confirm whether unlocking is required.
3. Go to Settings → Cellular or Mobile Data and look for Add eSIM. Labels vary by region and system language.

iPad: confirm it is a cellular model, not just the right generation

Check the model under Settings → General → About, then look for Cellular Data or Mobile Data in Settings. For a used iPad, check that its listing says “Cellular.” If a compatible model has no cellular menu, also check its OS and device-management settings.

Apple Watch: check cellular settings in the Watch app

On the paired iPhone, open the Watch app → My Watch → Cellular or Mobile Data. Ask your carrier whether your plan is eligible for Watch service.

Four checks before buying an eSIM

• Check both the manufacturer’s eSIM specifications and the plan provider’s requirements.
• If the device is carrier-locked, ask the original carrier whether it needs unlocking.
• Do not confuse the number of stored eSIMs with the number of lines that can be active together.
• Arrange an internet connection for installation and complete any required OS updates.

If your main line is an eSIM, check dual-eSIM support

iPhone 13 and later, as well as iPhone SE (3rd generation), support two active eSIMs. iPhone XS, XR, 11, 12 and iPhone SE (2nd generation) generally use a physical SIM plus an eSIM. If your main line is already an eSIM, check that it can remain active alongside the new line. Two active lines do not combine their mobile-data bandwidth.

Add a data eSIM when you need extra data in Japan

With a phone that supports the required dual-SIM setup, you can keep your existing number and use a separate eSIM for data. This can be useful when you run short of data near the end of the month or need a small top-up while out.

Almond eSIM’s Japan pay-as-you-go plan costs ¥200 per GB, with no monthly base fee and no expiry on topped-up credit. It is data-only and does not include voice calls or SMS.

Before use, check your model number, carrier-lock status and Almond eSIM’s instructions. After installation, select the line for mobile data and enable data roaming on the Almond eSIM line. If it does not connect, follow the instructions to check APN settings.

Explore Almond eSIM’s Japan pay-as-you-go plan (Japanese)

Frequently asked questions

Can any eSIM-compatible iPad use Almond eSIM?

eSIM hardware alone is not enough to confirm compatibility. Before buying, contact support with your iPad model and the Almond eSIM product you want to use. App compatibility also needs to be checked separately.

Will adding an eSIM remove my existing phone number?

Adding a new data line is separate from cancelling your existing service. Keep the existing line and select which line handles calls and which handles data. Porting your number to another carrier is a different process.

Does an EID guarantee that a plan will work?

An EID is a useful sign of eSIM capability, but it does not guarantee a particular service will work. Also check the purchase region, carrier lock, OS requirements and provider eligibility rules.

Should I delete the eSIM and try again if installation fails?

Avoid deleting it without guidance. Some products restrict reinstallation. Save a screenshot of the error and contact your eSIM provider.

Related guides

eSIM-compatible Android phones (Japanese)

How to check whether your device supports eSIM (Japanese)

Troubleshooting an eSIM connection (Japanese)

Official sources

Device information is based on the official manufacturer sources below. Specifications may vary by sales region and software version. Some linked pages are in Japanese.

Apple: SIM types used by iPhone and iPad

Apple: iPhone SE (2nd generation) specifications

Apple: Set up cellular data service on iPad

Apple: Supported Apple Watch carriers

Apple: iPhone Duo