🅰️After updating to iOS 17, there may occasionally be an issue where the signal bars do not display the signal strength, but this does not affect reception. You can try the following methods:

• Restart the iPhone
• Toggle Airplane Mode on and off
• Turn mobile data off and on
• Check for software updates

🅰️ Since JB voice SIM does not offer an online real-time data usage query service, please use the statistics function on your smartphone or tablet device. Please refer to the “How to check your mobile data usage” in the common questions of the JB series.

【 iOS Device】

「settings」➔「General」➔「About」➔「Carrier Lock」 ➔No SIM restrictions

【 Android Device】

You cannot determine this directly from the mobile phone. Please check with the place of purchase or the carrier you have a contract with.
SIM lock regulations vary by country. In Taiwan, most phones are not SIM-locked.Devices purchased in countries like Japan or the United States are more likely to have SIM lock issues.
📢If you have used SIM cards from different countries or carriers, the device is likely not SIM-locked.

🅰️ This benefit applies only when using the service within Japan.

• The first 5 minutes of each voice call made within Japan are free.
• Calls longer than 5 minutes will be charged at the standard voice call rate.

⚠️ This benefit does not apply when using the service overseas. Calls made abroad are charged according to international roaming rates.

🅰️ You can make calls to toll-free numbers such as 0120 and 0800.
🅰️ International calls are not available. Please use internet calling services such as LINE for international calls.

🅰️ Once you arrive in Japan, you can use the following services:

📞 Voice calls
💬 SMS (Text Messages)
🌐 Mobile data (1–50GB)

All of the above services are available for normal use.

📶 How Do I Use Mobile Data?

Before using mobile data for the first time, you need to complete a simple setup.

🤖 Android

• Manually configure the APN settings.

🍎 iPhone

• Download and install the configuration profile.

Once the setup is complete, you can use mobile data in Japan. Voice calls and SMS will also work normally.

📖 For detailed setup instructions, please refer to the user guide included with your SIM card.

🅰️ Yes! We offer both domestic shipping within Japan and international shipping.

🚚 Domestic Shipping (Japan)

Orders within Japan are shipped via Yamato Transport, and shipping is free.

🌏 International Shipping

International orders are shipped via EMS (Express Mail Service). Shipping fees vary depending on the destination.

• ¥1,450 — Zone 1 (China, South Korea, Taiwan)
• ¥1,900 — Zone 2 (Other Asian countries and regions)
• ¥3,150 — Zone 3 (Oceania, Canada, Mexico, the Middle East, and Europe)
• ¥3,900 — Zone 4 (United States, including overseas territories such as Guam)
• ¥3,600 — Zone 5 (Central & South America excluding Mexico, and Africa)

⚠️ Actual delivery times and available destinations are subject to the latest EMS service coverage and local postal conditions.

🅰️ Yes!

JB Voice SIM uses docomo’s international roaming service, so voice calls and SMS may be available while you’re in Hong Kong.

📶 The following mobile operators in Hong Kong may support VoLTE roaming:

• CMHK (China Mobile Hong Kong)
• CSL
• 3 Hong Kong (Three)

⚠️ Actual availability may vary depending on several factors, including:

• Your phone model
• Whether VoLTE is supported and enabled on your device
• The local mobile operator’s network conditions

We recommend confirming that your device supports VoLTE roaming before your trip for the best experience.

Please note that network environments may change over time, and actual connectivity depends on the services provided by the local mobile operator.