FAQ Category JB Voice SIM

How Can I Check Which Mobile Network I’m Using While Roaming?

🅰️ If your phone connects only to a GSM (2G) network while roaming, voice calls and mobile data may not work properly.

📶 Please check the current network type on your device.

✅ LTE / 4G / 5G — Normal service is available.
⚠️ GSM (2G) — Some countries have discontinued 2G service, which may affect voice calls or mobile data.

🍎 iPhone

Open the Phone app and dial *3001#12345#* to check your current network type.

💡 Field Test Mode is a built-in iPhone feature and does not incur any additional charges.

🤖 Android

Check the status bar at the top of your screen. If you see 4G, LTE, or 5G, your device is connected to a supported network.

Will I Be Charged for Receiving Lawson Ticket (ローソンチケット) Verification Calls Overseas?

🅰️ Yes, charges may apply.
If you receive a Lawson Ticket verification call outside Japan, international call charges may be incurred.

📞 Fee Information
  • Taiwan / Hong Kong / Macau: approximately JPY 174 per minute
    (Actual charges depend on your mobile carrier.)
  • Receiving the call within Japan: No charge
⏱️ Verification Call Duration
  • The call usually lasts only a few seconds to several tens of seconds and normally does not exceed 1 minute.
  • The verification code is provided through a Japanese voice message, so we recommend familiarizing yourself with how Japanese numbers are pronounced in advance.
📝 Registration Notes

Based on current testing, registering directly from Taiwan may sometimes fail.

A successful method that has been confirmed is to have the registration process completed with assistance from Japan, then receive the verification call in Taiwan and enter the verification code to complete the verification process.

How Is the 3G Shutdown Related?

📴 3G services have been discontinued, and international roaming voice calls now require VoLTE (4G voice calling) support.

⚠️ If your phone does not support VoLTE or VoLTE is not enabled, you may experience issues such as:

  • Unable to make calls
  • Unable to receive calls
  • Problems using voice calls while roaming overseas

Before traveling abroad, please confirm that your device supports VoLTE and that the feature is enabled to ensure normal voice call service while roaming.

How can I make the phone verification call for Ticket Pia (PIA)? Can it be used from overseas?

🅰️ Yes, it is possible!
Even when you are overseas (such as Taiwan), you can complete the verification by using international roaming to make a call to the Japanese phone number.

How to dial:
・Enter “+81” (Japan country code)
・Remove the first “0” from the phone number

Example:
050-1234-5678
➡️ +81 50-1234-5678

✅ When verification is successful, the call usually rings for 1–3 times and then automatically disconnects. The verification page will also proceed to the next step.

💰 Calls made from overseas to Japan may incur international roaming call charges according to your mobile carrier’s rates.

⚠️ If verification cannot be completed, please check the following:
・Make sure +81 is entered correctly
・Make sure the initial 0 has been removed from the phone number
・Confirm that your smartphone supports international calling and VoLTE functionality

Cancellation Process & Important Notes

📌 Cancellation Information

To cancel your service, please go to My Account and complete the Cancellation Form

🔹 If you cancel within the first 3 months of use, a cancellation fee of JPY 3,850 will apply.

🔹 After 3 months of use, you may cancel at any time without a cancellation fee.

🔹 If the cancellation request is completed by the 15th of each month, the cancellation will take effect within the same month.

📌 About Keeping Your Phone Number

If you cancel the service and apply again in the future, a new phone number will be assigned by the system.

Therefore, we cannot guarantee that you will receive the same phone number again.

Billing & Automatic Payment Information

① First Invoice

・Sent 2 business days after your scheduled delivery date (service activation date) from payment@jbrg.jp.
・Includes the first month’s monthly service fee.
・You must complete the credit card auto-payment setup at the same time.
・You may change your registered credit card for automatic payment at a later time.

② Monthly Invoices (From the Second Invoice Onward)

・An invoice for the following month will be sent on the 20th of each month.
・Example: Invoice sent on April 20 → for the May monthly fee.
・The monthly service fee will be automatically charged on the 1st of each month.

③ Additional Charges (Calls, SMS, etc.)

・A statement for additional charges will be sent on the 20th of the month after next following the month of usage.
・Example: Charges incurred in January → Statement sent on March 20.
・These charges will be automatically charged together with the corresponding monthly service fee.

Can I use my SIM card before the service start date? How will I be charged?

🅰️ Yes. You can start using your SIM card as soon as you receive it.

📌 Service Start Date
・For SIM cards delivered by mail, the contract starts on the actual delivery date.
・Due to international shipping, your SIM card may arrive before your scheduled service start date. If it arrives early, you may use it immediately.
📌 Monthly Subscription Fee
・The billing cycle runs from the 1st to the last day of each month.
・Monthly subscription fees are not prorated. (Even if your service starts in the middle of the month, the full monthly fee applies.)
📌 Charges Before the Service Start Date
You may start using your SIM card immediately after receiving it, without waiting for the service start date.

The following charges may apply between the day you receive your SIM card and your service start date:

① Data usage charges (according to your subscribed plan)
② Voice call charges (based on actual usage)
③ SMS charges (if applicable)

⚠️ No monthly subscription fee will be charged during this period. The monthly subscription fee begins on your service start date.

Examples:
・Service start date: May 1 / SIM received: April 29
➡️ You may start using the SIM on April 29. The monthly subscription fee begins in May.
・Service start date: May 15 / SIM received: May 13
➡️ You may start using the SIM on May 13. The full monthly subscription fee for May still applies.

How can I use the SIM card outside Japan?

🅰️ Once you receive your SIM card, you can use international roaming for voice calls and SMS while outside Japan.

📌 How to Use
✔ Simply insert the SIM card to use voice calls and SMS via international roaming.
❌ Mobile data (internet access) is not available outside Japan.

・For iPhone: Do not install a Configuration Profile.
・For Android: Do not configure the APN settings.

⚠️ Important Notes
・🛜 Turning Wi-Fi or 📶 Mobile Data on or off does not affect voice calls or SMS while roaming.
・💰 Since this SIM does not provide mobile data outside Japan, no international data roaming charges will be incurred.