How to Set Up a Japan eSIM on Android (Pixel and Samsung)

Android makes eSIM setup less predictable than iPhone, for one simple reason: there are many more phones. The same model can support eSIM in one country and not another, carrier-sold versions can behave differently from unlocked ones, and menu names change between manufacturers and software versions.

This guide focuses on the two Android families most travelers bring to Japan, Google Pixel and Samsung Galaxy, using the paths their makers publish. If you have another brand, the steps are similar, but follow your manufacturer’s help pages for exact menu names. Before buying a plan, check two things: that your exact model supports eSIM, and that it is not locked to your home carrier.

Does my Android phone support eSIM?

Many recent Pixel and Galaxy phones do, but it depends on the exact model and the country it was sold in. Do not rely on the model name alone. Check the manufacturer’s list, then confirm in your phone’s settings that an option to add an eSIM exists.

Google Pixel

Google’s dual SIM help page for Pixel says a Pixel 3a or later can use a physical SIM and an eSIM together. A Pixel 7, Pixel 7 Pro or later can use two eSIM profiles at once if the carrier allows it. Google also notes some exceptions: a Pixel 3a bought in Japan cannot use two SIMs, and Pixel 10 and later models in the US, except the Pixel 10 Pro Fold, are eSIM only with no physical SIM slot.

Samsung Galaxy

Samsung’s US page on SIM cards for Galaxy phones lists eSIM support across recent flagship ranges, including the Galaxy S20 series and later, Note 20 series, and Z Fold and Z Flip models, plus selected Galaxy A models. It also warns that, depending on the country of origin, eSIM may not be supported, and that some unlocked models use two physical SIM slots instead. Samsung’s lists change as new phones launch, so check your exact model number rather than the family name.

A quick way to confirm on a Galaxy: open Settings > Connections > SIM manager and look for Add eSIM. On a Pixel, open Settings > Network & internet > SIMs and look for an option to add an eSIM. If neither option exists, a travel eSIM will not install.

Check that your phone is carrier-unlocked

A phone bought from a mobile carrier, especially on contract, may be locked so that it only accepts that carrier’s service. A travel eSIM will not work on a locked phone.

Google’s page on using a Pixel with any carrier says a phone bought from a mobile service provider could be SIM-locked for up to two years, and that all phones sold in the Google Store come unlocked. Samsung’s support page says that if you change carriers, the device may need to be SIM-unlocked by the original carrier.

There is no single settings screen that confirms unlock status on every Android phone. The reliable options are:

• Ask your carrier. Most carriers show unlock status in their app or account page, or will confirm by phone or chat.
• Remember where you bought it. A phone bought outright and unlocked from the manufacturer or a retailer is usually unlocked; a carrier-financed phone may not be.
• Allow time. Unlock requests can take days. Start well before you travel.

How to install a Japan eSIM on Android

Install the eSIM at home or at your hotel on WiFi, with the provider’s QR code shown on another screen or printed. Read the plan’s start rule first: some plans start counting days on installation, others on first connection in Japan. Leave your home SIM in place.

On a Google Pixel

1. Open Settings > Network & internet > SIMs.
2. Tap Add SIM, then Set up an eSIM (wording varies a little by Android version).
3. Scan the provider’s QR code. If it will not scan, use the option to enter the activation code manually.
4. Follow the prompts. When asked about SIM preferences, keep your home SIM for calls and texts if you want your number reachable, and choose the travel eSIM for mobile data.

Google’s help page describes this path. Some versions of Android label the menu Network and Internet.

On a Samsung Galaxy

1. Open Settings > Connections > SIM manager.
2. Tap Add eSIM.
3. Choose the option to scan a QR code from your provider, then scan it. Samsung also lists an option to enter an activation code.
4. Confirm the download, then restart the phone, as Samsung recommends after adding an eSIM profile.

Older Galaxy software may call this SIM card manager and Add mobile plan, as Samsung’s UK guide to using an eSIM on a Galaxy phone shows.

Some providers also offer an app that installs the eSIM directly. Either route gives the same result.

Choose the data SIM and set roaming

With two lines installed, three settings decide whether your Japan data works and whether your home carrier charges you for roaming.

Choose which SIM uses mobile data

• Pixel: go to Settings > Network & internet > SIMs, turn on Mobile data, then under your primary SIMs tap Mobile data and select the travel eSIM. Google notes that only one SIM can be the default for data.
• Samsung: go to Settings > Connections > SIM manager, then under Primary SIM set Mobile data to the travel eSIM. Calls and texts can stay on your home SIM.

Give the travel line a clear name, such as Japan, if your phone allows it. It makes every later setting easier to read.

Turn roaming on for the travel eSIM only

Many travel eSIMs connect to Japanese networks as roaming services, so data will not work until roaming is on for that line.

• Pixel: in Settings > Network & internet > SIMs, tap the travel eSIM and turn on Roaming.
• Samsung: Samsung’s guide to turning data roaming on or off uses Settings > Connections > Mobile networks > Data roaming. With two SIMs, make sure you are changing the travel line.

Keep roaming off for your home SIM unless you intend to pay your carrier’s roaming rates.

Turn off automatic data switching

Some Android phones can switch mobile data between SIMs automatically when one has a weaker signal. On a trip, that can move data onto your home line and trigger roaming charges. If your phone offers an automatic data-switching option in its SIM settings, turn it off for the trip.

After you land in Japan

Turn the travel eSIM on if you switched it off after installing, confirm it is selected for mobile data, and give it a minute or two to register on a Japanese network. Load an ordinary webpage before leaving the airport WiFi. If the provider sent APN settings, enter them in the travel line’s access point settings as instructed.

To keep an eye on usage, Google’s guide to reducing and managing mobile data usage shows how to see app data usage and set a data warning. Our Japan data calculator helps you check whether your allowance matches how you actually use the phone.

Troubleshooting a Japan eSIM on Android

• No signal on the travel line. Check the eSIM is switched on in SIM settings and roaming is on for that line. Toggle airplane mode, then restart.
• Signal but no data. Confirm mobile data is set to the travel eSIM, not your home SIM. Check the APN matches the provider’s instructions.
• The eSIM will not install. Recheck that your model and region support eSIM and that the phone is unlocked. Make sure you are on a stable WiFi connection.
• Network not found. In the travel line’s network settings, choose networks automatically if it is set manually, or select a network the provider lists.
• Data running out quickly. Turn on Data Saver, set photo backup to WiFi only, and check app data usage to see what is responsible.

Do not delete or reset the eSIM while troubleshooting. Avoid any reset option that erases downloaded SIMs or eSIMs, because many travel eSIMs can only be installed once. Contact the provider’s support before deleting anything.

Before you buy a plan

Once your phone passes the compatibility and unlock checks, compare allowance and validity for your whole stay on our Japan eSIM comparison. If you need a Japanese number for calls or verification texts, read Japan eSIM plans with a phone number first, because most travel eSIMs are data-only. iPhone users can follow the iPhone setup guide, and the Japan eSIM FAQ covers activation and refund questions.