International roaming (worldwide mobile phone)

International service fees are not taxable.

This service allows you to make calls, send emails, and use data communications overseas using devices you use in Japan.

[Simple3 S /M/L]
From summer 2026, Simple3 S /M/L users will no longer be able to use the Overseas Anshin Flat Rate (Flat Rate Country L) and Overseas Unlimited Packets plans.
Instead, we plan to offer a service that allows users to use up to 2GB of data per month at no additional charge in countries covered by the "Overseas Anshin Flat Rate (Flat Rate Country L)" plan.
Details of the implementation period will be announced on our website and in other announcements.

Countries and regions where the service is available

Please be sure to read the "Notes on use" at the bottom of this page.

  • * Customers with a USIM/eSIM only contract are asked to check the supported frequencies on the manufacturer's website for their device and to check for themselves whether the service is available in the area they are traveling to.
Americas Oceania Asia middle east Europe Africa Americas Oceania Asia middle east Europe Africa

Choose an in-flight or ship mobile phone

  • Overseas Secure Fixed Rate
    Recommended
  • Unlimited overseas data

Application

Application Required

How to apply

Please confirm your subscription to the "Worldwide Mobile Phone" on My Y!mobile and apply for the "Overseas Secure Flat Rate" plan.
You can also apply via the SMS sent by SoftBank when you arrive at your destination.

World-compatible mobile phone
application Overseas fixed rate
application
  • * Applications cannot be made between 11:25pm and 12:30am the following day (Japan time).
  • * Between 12:30 a.m. and 7:00 a.m. (Japan time), it may take up to 30 minutes for your application to be completed.
  • *Applications cannot be made during system maintenance.
    Maintenance information can be found here.

Conditions of Application

Apply for the applicable plans "Worldwide Mobile Phone" and "Overseas Secure Flat Rate."

Eligible plans

You must be subscribed to "Simple3 S /M/L *", "Simple2 S /M/L", "Simple S/M/L", "Mobile Basic Plan SS", "Share Plan", "Smartphone Plan S/M/R/L (Type 1)", "Smartphone Basic Plan S/M/R/L (Type 1)", "Mobile Plan SS", "Data Plan S, L", "4G-S Plan", "4G-S Basic Plan", "Data Basic Plan S/L", "Data SIM Plan", "Tablet Plan S/M/L", "Pocket WiFi® Plan 2", or "Pocket WiFi® Plan 2 Light".

  • *From summer 2026, the Overseas Safe Flat Rate (Flat Rate Country L) plan will no longer be available for Simple3 S /M/L.
    Instead, we plan to offer a service that allows users to use up to 2GB of data per month at no additional charge in countries covered by the "Overseas Anshin Flat Rate (Flat Rate Country L)" plan.
    Details of the implementation period will be announced on our website and in other announcements.

Fees

Voice Calls

Please check the "Countries and Regions where this service is available" above to see the available areas and fees for each compatible model.

How to make and receive calls overseas

  • ●Depending on the country you are calling, you may be charged even if the call does not go through. Also, you may be charged even if you call a telephone number that the recipient pays for (such as a toll-free number).
  • ●Some services may not be available.
  • ●Group calling using VoLTE will be gradually discontinued overseas from Wednesday, August 21, 2024. *
  • *Group calling using 3G/GSM will end on April 25, 2024.
  • ・For details on group calls, click here

Overseas Secure Flat Rate (24-hour use)

Fixed price country L Mainland United States, Alaska, Hawaii, Puerto Rico, Virgin Islands (US territory), Thailand, Taiwan, China, South Korea, Hong Kong, Maldives, Germany, France, Italy, Guam, Australia, Canada, Mexico, Brazil, etc.
data
Traffic
/Flat rate		 24 hours
Plan		 3GB 980 yen
72 hours
Plan		 9GB 2,940 yen
96 hours
Plan		 12GB 3,920 yen
Fixed price country S Bahamas, Zimbabwe, Iran, Micronesia, Djibouti, Lebanon, Belize, etc.
Data traffic
/Flat rate		 1MB 1,980 yen
5MB 9,800 yen
10MB 19,600 yen
Use on airplanes and ships
Available only on equipped aircraft.
Data traffic
/Usage hours
/Flat rate		 50MB 1time 980 yen
100MB 5time 1,960 yen
150MB 15time 2,940 yen

"Overseas Secure Flat Rate" Terms and Conditions

How to set up an overseas fixed rate plan

  1. After logging in to My Y!mobile, click "View contract details" to confirm that you have subscribed to the "Worldwide Mobile Phone" plan.
    • *When using Pocket WiFi®, please apply from your smartphone or PC.
    • *If you have a shared plan contract, please log in to My Y!mobile using the phone number of the line on which you would like to use the Overseas Anshin Flat Rate service.
  2. Apply for "Overseas Anshin Flat Rate" through the dedicated "Overseas Anshin Flat Rate" website​
    • *When using Pocket WiFi®, please apply from your smartphone or PC.
  3. Setting up data roaming

    iPhone

    Smartphones, tablets, 4G mobile phones

    Pocket WiFi® * Settings vary depending on the model, so after selecting the model you want to use from the model list, please check the instruction manual in the support tab (PDF).

  4. Once you're at your destination, access the dedicated website via the SMS sent from SoftBank and start using the service.
    Check the SMS sent from Y!mobile
    • ・There is no connection fee.
    • ・ Charges will be incurred from the start of use.
    • ・ You can start using the service when you are connected to an overseas mobile network (please turn off Wi-Fi before starting the service).
    • - If you are using a private relay or VPN, please turn it off before starting use.
Get started
See how to use it in detail

1

Select the plan you want and tap "Start using"

  • ・Due to the circumstances of overseas telecommunications carriers, the country you are in may differ from the country displayed.

2

Check the plan and tap "Start using"

  • ・When you tap "Start using", the flat rate of the plan will be charged. Cancellation is not possible. You will receive a notification (SMS) when the plan starts.

3

Usage will start and you can check the remaining time and data volume.

  • - If you wish to use the service after the usage plan time has expired or the data volume limit has been exceeded, please select a new plan and start using the service again.
  • ・ Once you start using the service, your previous plan will end.
  • * If you are using Pocket WiFi®, you can use it by opening the start-up site URL on the connecting device (WiFi-connected smartphone or tablet, etc.). Please bookmark the start-up site URL and use it.
  • *If you move to a country or region that belongs to another group after starting use, your data communications will be stopped.
  • * If you cancel this service after you have started using it, your current plan will also end at the same time.
  • *Even if you have signed up for a sharing plan, you cannot share data at your destination. If you wish to use this service, you will need to apply for the Overseas Anshin Flat Rate plan for both the main line and the secondary line (charges will be incurred separately for the main line and the secondary line).

Application and Fees

Application Required
Monthly fee Free

Notes on application

"Unlimited Overseas Data" is only available to customers who have applied for the optional service "Worldwide Mobile Phone" (free of charge).
Depending on your contract status, you may not be able to apply. Please see below for details.

Contract including device purchase USIM/eSIM only contract
New contract Available Unavailable
MNP/number transfer/contract change Available
Changing devices /information change/transfer Available※1,2 Unavailable※3
  • *1 You can also subscribe when Changing devices due to theft or loss.
  • *2 If you were already subscribed before the transfer, you can continue to use the service.
  • *3 If you sign a new contract (excluding MNP and number porting), you will not be able to subscribe until the end of the fourth month after signing the contract.

How to apply

Please apply through My Y!mobile.

Apply for a world-compatible mobile phone

Compatible models

It can be used with models that are compatible with "Worldwide Mobile Phones."

  • iPhone
  • Smartphone
  • tablet
  • Mobile phone
  • Mobile data communication (Pocket WiFi®)
  • *The following models of products sold by Y!mobile are not compatible with "World-compatible mobile phones."
    Simply・Car Wi-Fi・Media Pad M1 8.0
  • *Pocket WiFi® 701UC can only be used when an overseas data plan is not available.

Fees

Voice Calls

Please check the "Countries and Regions where this service is available" above to see the available areas and fees for each compatible model.

How to make and receive calls overseas

  • ●Depending on the country you are calling, you may be charged even if the call does not go through. Also, you may be charged even if you call a telephone number that the recipient pays for (such as a toll-free number).
  • ●Some services may not be available.
  • ●Group calling using VoLTE will be gradually discontinued overseas from Wednesday, August 21, 2024. *
  • *Group calling using 3G/GSM will end on April 25, 2024.
  • ・For details on group calls, click here

Data communication service: Unlimited overseas data

Number of bytes used
(maximum)		 Unlimited overseas data
Before After
Up to 12.5MB * 0 yen to 51,199 yen 0 yen to 1,980 yen/day
12.5MB or more * 51,200円～ 2,980 yen/day
  • ・From summer 2026, the "Unlimited Overseas Data Plan" will no longer be available on Simple3 S /M/L plans.
    Instead, we plan to offer a service that allows users to use up to 2GB of data per month at no additional charge in countries covered by the "Overseas Anshin Flat Rate (Flat Rate Country L)" plan.
    Details of the implementation period will be announced on our website and in other announcements.
  • - One day will be from 0:00 to 23:59:59 Japan time.
  • ・Voice calls and SMS are not covered by the "Unlimited Overseas Data Plan."
  • * If you are using a 3G mobile phone: 10MB
    If you are using a 3G smartphone: 25MB

  • *1 If you are using a 3G mobile phone: 386KB
    If you are using a 3G smartphone: 990KB
  • *2 If you are using a 3G mobile phone: 10MB
    If you are using a 3G smartphone: 25MB

"Unlimited Overseas Packet" Terms and Conditions

data

Packet communication charges 2 yen/1KB *
  • * LTE charges are 4 yen/1KB. The above applies to the United States, Hawaii, China, etc.
    Includes PC site browser (including PC email).

How to use email overseas - MMS

SMS

Transmission fee 100 yen/mail (uniform)
Reception fee Free

How to use email overseas - SMS

[How to set up unlimited overseas data plan]

[1] Check if you have a free global mobile phone plan
Please use My Y!mobile to apply for or change your "World-compatible mobile phone" (free of charge).

Click here for setup instructions

[2] Setting up unlimited overseas data plans
Before using the service overseas (before traveling), be sure to check the countries where the "Unlimited Overseas Data Plan" is available and how to use it below. (You will be redirected to SoftBank website.)

For iPhone users

See how to set it up

See the list of countries eligible for the flat rate

When using a smartphone

See how to set it up

See the list of countries eligible for the flat rate

[3] Unlimited overseas data plans will automatically be applied when you arrive at your destination
When you arrive at your destination, you will receive an SMS from Y!mobile to inform you that you will be able to use unlimited overseas data. automatically Applies to.

Check the contents of the SMS

Notifications regarding communication failures, etc.

We will inform you of information regarding disruptions to international services.

View International Service Notices

Important Notices

  • ●Call and data charges overseas are not covered by your domestic Price Plan, free data transfers, flat-rate plans (including flat-rate services such as "unlimited overseas data transfers"), or discount services.
  • ●Depending on the model of device you use, it may be prohibited to bring it into the country/region you are traveling to due to laws and regulations. Please check the regulations of your destination country/region in advance.
  • ●Depending on the circumstances of the overseas telecommunications carrier or each region, you may not be able to use the service or communication may be unstable even within the service area. If you are planning to travel or stay in each country, please check the regulations of each country in advance.
  • ●Depending on your contract and the model of your device, some services may not be available.
  • ●Charges may apply when performing server mail operations overseas (updating lists, deleting emails, etc.) and for some answering machine services.
  • ●Data communication may occur automatically without the user's operation on the device, such as automatic reception of emails, automatic communication functions of various applications, automatic data synchronization functions on smartphones, and functions for checking the latest software and applications. Depending on the model, the initial setting for emails may be set to automatically "receive all texts," so we recommend changing the setting to "manual reception" to receive only necessary emails according to usage.
  • ●When making a call overseas, the caller ID displayed to the recipient may not be displayed correctly, such as a phone number that is not yours or a withheld number.
    Also, when receiving a call, the caller's phone number may not be displayed correctly.
  • ●When using collect calls, toll-free calls, credit calls, or prepaid card calls overseas, you may be charged for calls to the country you are staying in addition to the call charges for the service you used.
  • ●If you call a mobile phone from Japan to a person overseas, the caller in Japan will be charged domestic calling and communication charges.
  • ●When calling from one mobile phone to another while overseas, the caller will be charged the call and data charges to Japan.
  • ●If you receive a call at your destination and answer it, you will be charged for the incoming call regardless of the caller.
  • ●When making a call from a mobile phone that is roaming internationally to another mobile phone that is roaming internationally, the caller is charged the "charge to Japan" and the recipient is charged the "incoming call charge."
  • ●Charges may also be incurred if you are calling or cannot connect to a caller, or if you fail to connect due to a communication error while using packet communication services (MMS, web, or mobile data communication).
  • ●If we find that your usage amount has exceeded a certain amount, such as becoming high, we may suspend your service.
  • ●"Overseas Unlimited Packet Data" does not apply during the period when "Overseas Anshin Flat Rate" is applied.
  • ●If you are using the "Unlimited Overseas Packet" service, please cancel the "Overseas Secure Flat Rate" service here.
  • ●Once the plan has started, it cannot be cancelled.
  • ●You may be able to use some of the services of overseas carriers before the official launch of their services.
    In addition, depending on the service content or technical factors of the overseas telecommunications carrier, you may be able to use services of a different generation from the one you have contracted for in Japan.
    In this case, you will also need to pay for the service related to the generation you used, and the fee will be incurred at the time you use the service. For S!Mail and Web, the fees are "3G/GSM: 2 yen/1KB" and "5G/4G (LTE): 4 yen/1KB."
    Please note that overseas flat-rate packet services may apply depending on the country or region of your destination and your application status, etc. For details on the fees for each overseas flat-rate packet service and overseas calling charges, please click here.

Caution regarding theft and loss

Mobile phones have an IC chip, a USIM card, which records your phone number and other information. (If you use an eSIM, it is embedded in the smartphone itself.) The USIM card/eSIM is also the basis for billing your usage fees. If any charges are incurred due to use by a third party, you will be responsible for these charges. If your mobile phone is stolen or lost, please contact the International Call Center (see below) immediately. Your line will be suspended immediately.

Setting a PIN code: Set a PIN code

USIM cards/eSIM cards have a secret code called a PIN code. Change the PIN code that is set to "9999" at the time of purchase, and set it so that you enter the PIN code when you turn on the power.

  • ※For details on how to set the PIN code, please refer to the instruction manual.
  • ※Please be careful not to forget your PIN code. (If you enter the wrong PIN code three times in a row) The PIN lock can be released by entering the PIN unlock code (PUK code). Please contact the International Call Center (see below) for information on the PUK code.

Y!mobile Customer Center
From your country/region +81-44-382-0800 (Charged) [Operator support hours] 10:00-19:00 (open all year round)

  • ●Please be careful not to dial the wrong phone number.
  • ●If you are calling from a landline overseas, please dial the international access code instead of "+".

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