Mobal eSIM setup is straightforward only after you identify which product you bought. A Data-Only eSIM can usually be prepared digitally, while Voice-Only, Voice+Data, or a product labelled Voice Lite uses a different process because it provides a Japanese phone number.

This guide separates those paths, then shows what to check on iPhone and Android before and after arriving in Japan.

Current-information note: Mobal’s product, activation, installation, compatibility, and troubleshooting pages were checked on September 9, 2026. Menu names vary by phone and operating-system version. Follow the instructions in your own Mobal confirmation email when they differ from this overview.

Product distinction checked October 7, 2026: Current Voice-Only is for calls and SMS, without mobile data. Official Voice Lite support pages describe different terms; do not treat the names or detailed setup steps as interchangeable. This additional check does not revalidate every price or instruction in this guide.

The short answer

Your Mobal product What starts the process Activation guidance Important difference
Data-Only eSIM MyAccount → Services → Activate Immediate requests: email in about 15 minutes; future requests: about 24 hours before the selected date No Japanese phone number
Voice+Data eSIM Physical eight-character access code, then MyAccount activation Processing can take up to 24 hours in some cases May require your device’s 32-digit EID
Current Voice-Only eSIM Receive or collect the access code, then use the supplied activation instructions Follow your order’s product-specific instructions Calls and SMS; no included mobile data
Voice Lite eSIM Physical eight-character access code, then MyAccount activation Processing can take up to 24 hours in some cases Only for a product labelled Voice Lite; limited-data terms differ from current Voice-Only

Do not wait until you are standing at airport immigration to begin the voice-eSIM process. Mobal says the voice-product access code is mailed or collected rather than simply sent by email.

Check current Mobal eSIM options

Before you start

Complete these checks before activating or installing any Mobal eSIM:

  • confirm the exact product name in Mobal MyAccount;
  • confirm that the phone is carrier-unlocked;
  • confirm that the device has built-in eSIM support;
  • keep a stable WiFi connection available;
  • disable Airplane or Flight Mode during installation;
  • save your order number, confirmation email, and setup instructions offline;
  • understand when the selected plan begins and when charges start;
  • keep your home SIM settings under control to avoid roaming charges.

For most phones, dialing *#06# shows device identifiers. An eSIM-capable device normally shows a 32-digit EID. Mobal does not support adapters that add eSIM-like functionality to a phone that was not built for eSIM.

Voice products need additional compatibility checks. The phone must support the relevant Japanese network frequencies and VoLTE for calls. Mobal also limits its current Voice+Data eSIM to specified EID types, so use the provider’s live compatibility page rather than relying only on the presence of an EID.

First, identify your Mobal eSIM

Log in to Mobal MyAccount and read the exact product name shown in Services.

Data-Only eSIM

Choose this path when the product name says Data-Only or 5G Unlimited Data-Only. It is designed for mobile data, not conventional Japanese calls or SMS.

Current Voice-Only eSIM

Match the product name in your order. The current Voice-Only offer provides calls and SMS without included mobile data. Keep maps and web access on a separate suitable connection.

Receive or collect the physical access code and complete the required identity checks. Use the activation route supplied with your order, then follow the installation instructions for that product. The Japanese number is assigned at activation. Do not borrow Voice Lite’s data settings or processing-time estimate.

Voice+Data eSIM

Choose this path when the product name says Voice+Data 5G eSIM, Voice+Data eSIM, or Voice+Data 4G eSIM. These products include a Japanese phone number as well as mobile data.

The distinction between the current 5G product and the older 4G product matters during data setup because they use different APN instructions.

Voice Lite eSIM

Choose this path only when your account or order says Voice Lite. Its product-specific data guide describes a Japanese phone number and a small data allowance, not the current Voice-Only terms. Use its own activation instructions; it is not a substitute for an ordinary high-data travel plan.

If you are still deciding which service you need, read our Mobal review and Mobal vs Sakura Mobile comparison before purchasing.

How to activate a Mobal Data-Only eSIM

Step 1: Open the service in MyAccount

Sign in to Mobal MyAccount, open Services, and select Activate next to the correct Data-Only eSIM.

Confirm that the phone is eSIM-compatible when prompted. Do not activate a plan for a different device by mistake.

Step 2: Choose the activation date

Mobal lets you request immediate activation or select a future activation date.

For an immediate request, Mobal says the email titled “Your Mobal eSIM is ready!” normally arrives within approximately 15 minutes. For a future date, the company says the email normally arrives about 24 hours before that date.

Mobal also states that products requiring activation should be activated within 30 days of purchase, or within 30 days of collection when pickup was selected.

Step 3: Open the setup instructions

The confirmation email provides separate iPhone and Android setup options. Open the instructions for the phone that will actually use the eSIM.

The email contains a QR code or manual installation details. Keep them private. If the QR code is displayed on the same phone, newer iPhones may be able to install it from a saved image; otherwise open the code on another screen or use the manual method.

Step 4: Install over WiFi

Connect the phone to stable WiFi and make sure Airplane Mode is off.

Follow the QR-code or manual-installation route in the Mobal email. Give the line a clear label such as “Mobal Japan” so you do not confuse it with your home line.

When the phone asks for default lines:

  • keep your existing line or Apple ID for voice and iMessage when using Data-Only;
  • select Mobal for cellular data;
  • turn off automatic cellular-data switching if you do not want the phone to fall back to your home carrier.

Step 5: Do not panic if it says “Activating”

A Data-Only eSIM installed outside Japan may remain on “Activating” or “Connecting to network.” Mobal’s Data-Only instructions say it will not connect until the device is in Japan; do not apply that rule to every voice product’s roaming options.

If the Mobal line is visible in the phone’s SIM-management screen, the profile may already be installed correctly. Do not delete it just because it cannot connect overseas.

Step 6: Connect in Japan

After arrival, enable the Mobal line and select it for cellular data. Follow the correct APN or data-settings link in the confirmation email if required.

Mobal says the Data-Only plan officially starts on the day it first connects to the network in Japan, not simply when the profile is installed overseas.

How to activate a Mobal Voice+Data or Voice Lite eSIM

Use the steps below only when your purchased product matches this heading. For current Voice-Only, use the overview above and your order’s own instructions rather than assuming these detailed steps apply.

Step 1: Receive or collect the access code

Voice-capable eSIMs require an eight-character access code containing letters and numbers. Mobal sends it by mail or provides it at the selected collection point.

This physical step is part of the identity process. The access code is not the same thing as the QR code used later to install the eSIM profile.

Step 2: Open Services in MyAccount

After receiving the access code, sign in to MyAccount, open Services, and choose Activate next to the correct Voice+Data or Voice Lite product.

Enter the access code. Depending on the product, Mobal may also request the device’s 32-digit EID.

For many phones, the EID is available by dialing *#06#. It can also appear under Settings → General → About on iPhone or Settings → About phone → Status information on Android.

Step 3: Choose the plan and activation date

Voice+Data buyers may need to select a short-term or ongoing plan and a high-speed data allowance. Voice Lite has its own ongoing-plan path.

Read the billing summary before submitting. For ongoing service, activation dates, prorated first-month fees, calendar-month renewals, usage charges, and cancellation timing can affect the total.

If you request immediate activation, Mobal warns that processing can take up to 24 hours in some cases. When a future date is selected, the provider normally begins processing in advance so the service is ready on that date.

Step 4: Wait for the activation confirmation

After activation, Mobal sends an email with the assigned Japanese phone number and installation instructions. A phone number is assigned at activation, so it is not available in advance.

Do not try to reuse a Data-Only QR workflow for a voice product. Follow the email attached to the exact service shown in MyAccount.

Step 5: Install the voice eSIM

Depending on the product and phone, a Voice+Data eSIM may arrive as a Docomo push notification or may require QR-code or manual installation.

If manual installation reports that the profile already exists, check the SIM-management screen before trying again. A push installation may already have completed.

During setup, select the Mobal line for calls and, for Voice+Data, cellular data. Decide separately whether iMessage should continue using your existing number or Apple ID.

Step 6: Install the correct data settings

After the profile is installed, follow Mobal’s data-settings guide for the exact product name in MyAccount.

This is particularly important for Voice+Data:

  • Voice+Data 5G eSIM is the newer version;
  • Voice+Data eSIM or Voice+Data 4G eSIM is the older version;
  • each version has its own APN instructions.

On iPhone, Mobal instructs users to download its APN configuration profile through Safari. On Android, users may need to create an APN manually. Use the current values on Mobal’s page rather than copying an old setup screenshot from another website.

iPhone setup checkpoints

Apply cellular-data, APN, and webpage checks only to a product that includes data. Voice-Only is not a mobile-data connection. Check the assigned number and voice settings separately; outgoing test calls or SMS may be charged.

Menu names can differ by iOS version, but these checks prevent most line-selection mistakes:

  1. Open Settings → Cellular or Mobile Data.
  2. Confirm that the Mobal eSIM appears and is enabled.
  3. Give it a recognizable label.
  4. For products with data, select Mobal as the cellular-data line when you want to use it. For Voice-Only, keep a separate suitable data connection.
  5. For a product with calls, select Mobal as the voice line when needed.
  6. Disable cellular-data switching if fallback to the home line could create roaming charges.
  7. For products with data, install the correct Mobal APN profile through Safari when the product guide requires it.
  8. For products with data, turn WiFi off temporarily when testing mobile data in Japan.

If a PIN is requested while installing an iPhone configuration profile, Mobal says this normally means the phone’s device passcode, not a new SIM PIN.

Android setup checkpoints

Android menu names vary substantially by manufacturer. In general:

  1. Open Settings → Network & Internet, Connections, or SIM manager.
  2. Confirm that the Mobal eSIM is present and enabled.
  3. Select Mobal for mobile data only if the product includes data; Voice-Only needs a separate suitable data connection.
  4. Select Mobal for calls if the plan includes voice.
  5. Disable automatic data switching when appropriate.
  6. For products with data, create and select the APN shown in the current guide for your exact Mobal product.
  7. Confirm that Preferred Network Type allows the product’s supported 4G or 5G mode.
  8. For products with data, turn WiFi off temporarily and test a webpage in Japan.

Saving an APN is not always enough; make sure the new profile is selected as active.

Arrival-day test

Run the data checks below only for a product that includes data. For Voice-Only, check the assigned number and voice-line settings, not whether the line loads a webpage. Outgoing calls or SMS used for testing may be charged.

  • confirm that the Mobal line is enabled;
  • for products with data, confirm that Mobal is the selected cellular-data line;
  • for products with data, turn off WiFi;
  • wait a few minutes, then reboot once if necessary;
  • for products with data, load a simple webpage and check maps or messaging;
  • for voice products, confirm the assigned number and correct voice-line selection;
  • verify that the home line is not supplying data.

Mobal notes that occasional maintenance between late Tuesday and Wednesday morning Japan time can delay first connection. If all settings look correct during that window, wait briefly and retry before changing the installation.

Mobal eSIM not working: troubleshooting order

Use this order to avoid turning a simple settings problem into a replacement problem.

Symptom Check first
QR code reports an error Check whether a push notification already installed the eSIM and whether another active eSIM must be disabled
“Activating” outside Japan For Data-Only, check the installed line and Japan-only connection instructions. For voice products, follow the exact plan’s activation and roaming guidance
Signal but no data First confirm the plan includes data; then check the data line and product-specific APN
Calls do not work Confirm Mobal is the voice line and the phone supports VoLTE
5G does not appear Confirm the exact product, phone bands, network mode, location, and coverage
PDP authentication failure on iPhone Remove conflicting APN profiles and reinstall the correct current Mobal profile through Safari
Still no connection Record the phone model, location, screenshots, APN, network mode, and SIM-management settings for Mobal support

Do not delete the eSIM as a first fix

Mobal repeatedly warns users not to delete an installed profile while troubleshooting.

Replacement rules vary by product and order date. Mobal’s current product-specific FAQ says a deleted 5G Unlimited Data-Only eSIM cannot be reinstalled or reissued. For a 5G Fixed Data-Only eSIM ordered after December 26, 2025, reinstallation may be possible on the same device using the original installation details. Check the exact product and order date before taking any action.

Targeted check: These reinstallation rules were checked on October 11, 2026. This does not revalidate all setup instructions or prices in this guide.

First take screenshots, verify settings, and contact support. Delete the profile only when Mobal specifically instructs you to do so or you fully understand the replacement consequence.

Frequently asked questions

Can I install a Mobal eSIM before flying to Japan?

Yes, an eligible Data-Only profile can be installed before travel over WiFi. It may show “Activating” because Mobal service only connects in Japan. Voice products first require the access-code and activation process.

When does a Mobal Data-Only eSIM start?

Mobal says the plan begins on the day the installed eSIM first connects to the network in Japan. Still choose the activation date carefully and follow the confirmation email for the exact product.

Does the QR code give me a Japanese phone number?

Not by itself. Data-Only products do not provide conventional voice or SMS. A Japanese number comes with an eligible Voice-Only, Voice+Data, or product labelled Voice Lite; follow the activation confirmation for that service.

Why did Mobal ask for an EID?

The EID identifies the phone’s embedded eSIM chip. Mobal may request it for a voice-capable eSIM and currently limits Voice+Data compatibility to specified EID types.

Should data roaming be on?

Do not assume a generic travel-eSIM rule applies. Use the setting shown in the instructions for your exact Mobal product. Keep data roaming and cellular-data switching disabled on the home line unless you intentionally accept your home carrier’s charges.

What should I save before departure?

Save the confirmation email, QR or manual installation information, product name, activation date, MyAccount login route, official data-settings page, support contact, and an offline map for arrival.

Bottom line

The most important Mobal setup step happens before scanning a QR code: identify whether the service is Data-Only, current Voice-Only, Voice+Data, or a product labelled Voice Lite.

Data-Only is the faster digital path and normally starts when it first connects in Japan. Voice products require a physical access code, identity-linked activation, and product-specific installation instructions. Install on stable WiFi and do not delete the profile during troubleshooting. Select a data line and follow APN instructions only for products that include data; Voice-Only needs a separate suitable data connection.

Compare current Mobal plans and compatibility

Official sources