A travel eSIM works in Japan if your phone passes two checks: it supports eSIM, and it isn’t locked to your home carrier. This page covers only those two checks. Prices, where to buy, and when pocket Wi-Fi works out cheaper are in our eSIM vs pocket Wi-Fi comparison.
By FUJI SAMURAI | HOW JAPAN WORKSChecked 18 Oct 2026 against Apple, Google, Samsung and US carrier help pages
Quick check
| Your phone | Supports eSIM? | Is it unlocked? |
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| iPhone | iPhone XS, XS Max, XR or later | Settings › General › About. “No SIM Restrictions” next to Carrier Lock means unlocked |
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| Google Pixel | Pixel 3a or later, except a Pixel 3a bought in Japan or with Verizon service | Bought from the Google Store: unlocked. Bought from a carrier: ask that carrier |
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| Samsung Galaxy | Look for Add eSIM in Settings › Connections › SIM manager | Ask the carrier you bought it from |
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| Other Android | Check the phone maker’s help pages or the eSIM provider’s device list | Ask the carrier you bought it from |
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Check 1: Does your phone support eSIM?
iPhone. Apple lists iPhone XS, iPhone XS Max, iPhone XR and later as able to use eSIM. Some newer iPhones are eSIM-only and have no SIM tray; those can take a travel eSIM too.
Google Pixel. Google’s help pages say Pixel 3a and later work with eSIM, with one exception: a Pixel 3a bought with Verizon service or bought in Japan doesn’t work with eSIM. In the US, Pixel 10 models other than the Pixel 10 Pro Fold use eSIM only.
Samsung Galaxy. eSIM lives in Settings › Connections › SIM manager, under Add eSIM. Samsung notes that some carriers may not yet support eSIM on Galaxy devices, and that menus vary by carrier, software version and model.
Other Android phones. Use the phone maker’s help pages, or the eSIM provider’s compatible-device list, before you buy. Support can depend on the exact model and where it was sold.
Keeping your home number on at the same time
A travel eSIM goes in alongside your home line. Whether both can stay active depends on the phone:
- iPhone SE (3rd generation), iPhone 13 and later can have two eSIMs, for example your home eSIM plus a travel eSIM (Apple).
- iPhone XS, XS Max, XR, iPhone 11, iPhone 12 and iPhone SE (2nd generation) support one physical SIM plus one eSIM. To keep your home line on alongside a travel eSIM, the home line needs to be on the physical SIM. If your home line is already an eSIM on one of these models, check with Apple or your carrier.
- Pixel 7 and later can hold two eSIM profiles, if your carrier allows it. Pixel 3a to Pixel 6 use one physical SIM plus one eSIM (Google).
- Other phones: check the maker’s help pages.
Check 2: Is your phone unlocked?
A travel eSIM is a plan from another carrier. A phone locked to your home carrier won’t accept it.
- iPhone: Settings › General › About. If “No SIM Restrictions” appears next to Carrier Lock, the phone is unlocked (Apple).
- Google Pixel: phones sold in the Google Store are unlocked. A Pixel bought from a mobile carrier could be SIM-locked for up to two years (Google).
- Other phones: the carrier or store you bought it from can tell you the lock status.
If it’s locked, only that carrier can unlock it. The rules differ by carrier and account, and they change: Verizon updated its policy for phones bought from 27 January 2026. Check your carrier’s current page, and allow time before your flight:
If your phone doesn’t pass
- Roam with your own carrier. This works even on a locked phone. Ask your carrier about its Japan options and cost.
- Use a pocket Wi-Fi. Your phone just joins it over Wi-Fi, so eSIM support and lock status don’t matter.
- A physical SIM card won’t help a locked phone. A locked phone can’t use another carrier’s SIM either.
See pocket Wi-Fi costs and where to get one →
After you buy
You’ll get a QR code or an activation link from the provider. Apple says an iPhone needs Wi-Fi or a hotspot to activate an eSIM, so install it somewhere with good Wi-Fi. Follow your phone maker’s steps:
Sources (official help pages, checked 18 Oct 2026)
This guide doesn’t sell eSIMs and contains no affiliate links.
