🅰️ Yes, multiple SIM usage is supported.
If your smartphone supports Dual SIM or multiple SIM functionality, you can use multiple physical SIM cards and/or eSIMs at the same time for more flexible usage.
⚠️ The number of SIM cards/eSIMs that can be used depends on your device model and specifications. Please check your device compatibility before use.
The default settings are as follows:
Network Password: 1234
PIN Code: 0000
⚠️ We recommend changing the password according to your needs after use to improve security.
🅰️ Yes, you can use them together.
You can use JB Voice SIM and Wi-Fi at the same time depending on your needs.
・Use Wi-Fi for internet access
・Use the SIM card for voice calls and SMS
Flexible and convenient!
✅ Basic Usage (Voice Calls / SMS)
Simply insert the SIM card into your smartphone, and you can immediately use voice calls and SMS!
Your smartphone will automatically display your Japanese phone number, making it very convenient 👍
📞 Voice Call & SMS Settings
If you only use voice calls and SMS after inserting the SIM card:
You do not need to connect to Wi-Fi.
You do not need to configure mobile data settings.
📶 Mobile Data Settings (For Use in Japan)
If you want to use mobile data:
iPhone: You need to download the configuration profile.
Android: You need to manually configure the APN settings.
🅰️With JB voice SIM, you cannot choose your phone number. The phone number will start with 080 or 070.
Yes, you can use this service if the following conditions are met:
✅ Your smartphone is connected to Wi-Fi
✅ The Wi-Fi Calling function is enabled
✅ You are using a supported device (iPhone / Android)
✅ Your SIM card remains active (not suspended or cancelled)
📞 Making calls
・Calling a Taiwan number → Taiwan domestic call charges
・Calling a Taiwan mobile number → Taiwan domestic rates
・Calling overseas (e.g., Japan) → International call charges
👉 No international roaming charges will apply
📲 Receiving calls
・Receiving calls from Taiwan → Free (same as receiving calls in Taiwan)
🌸View Used Mobile Data
“Settings” ➔ “Cellular”
➔ “Current Period” shows the total mobile data usage for the current period.
Scroll down to see the mobile data usage for individual apps.
🌸Reset Statistics Before Viewing
“Settings” ➔ “Cellular”➔ scroll to “Reset Statistics” to reset the mobile data usage for the “Current Period” to 0. 📢If you want to view the mobile data usage for a different SIM, please first switch the “Cellular Data” SIM.
The Android system may have different screens and operation methods depending on the brand and model. Here, we will explain how to check mobile data usage using the Galaxy A55 as an example.
🌸View Data Usage
“Settings”➔”Connections”➔”Data usage”
You can view the total amount of mobile data used in the current billing cycle.
🌸Set Billing Cycle Before Viewing Statistics
“Settings”➔”Connections”➔”Data usage”➔”Billing cycle and data warning”➔to reset the mobile data usage statistics.
In accordance with the regulations of Japan’s Ministry of Internal Affairs and Communications (MIC), applicants for a Japanese phone number are required to submit their passport and proof of their current residential address.
＜eSIM will be delivered by email＞
＜Physical SIM cards can only be shipped to the address shown on the proof of address＞
■ Proof of Current Residential Address
Please provide **one** of the following documents showing **both the subscriber’s name and current residential address:
・Driver’s license, certificate of residence, or a tax-related document issued by a government authority
・Utility bill (Electricity bills / Gas bills / Water bills / Telephone bills, etc.)
・Credit card statement or bank statement, etc.
■ If you would like the SIM card to be delivered to a hotel in Japan, please provide **both** of the following:
1. Hotel reservation confirmation showing the subscriber’s name and check-in date
2. Proof of current residential address
※ Shipping to Japan forwarding services or relatives’/friends’ addresses is not allowed
📢 Normal Usage Within Japan ; Compatibility Guide for docomo International Roaming VoLTE Calls
【Warning】If you only intend to use the service for verifying Japanese websites while overseas, please note that Samsung devices, iPhone 16e, Phone 17e/Air, and iPhone 18 series may not work properly overseas.
As 3G networks have been shut down in Japan and many other countries, you must use a VoLTE-compatible phone model to utilize docomo’s international roaming voice call services.
⚠️ Some devices may be completely unable to use the service overseas, while others may only be able to receive SMS and may not be able to make or receive calls.
💡 Actual compatibility may vary depending on the country or region where the device was manufactured.
| Model Name | Model Number | Roaming VoLTE Calls | Roaming SMS | Notes |
|---|---|---|---|---|
| ASUS ROG Phone 8、ASUS ROG Phone 9 | 〇 | 〇 | ||
| ASUS ZenFone Max Pro (M2) | 〇 | 〇 | ||
| ASUS Zenfone 9 | AI2202 | 〇 | 〇 |
| Model Name | Model Number | Roaming VoLTE Calls | Roaming SMS | Notes |
|---|---|---|---|---|
| Global Version | 〇 | 〇 |
| Model Name | Model Number | Roaming VoLTE Calls | Roaming SMS | Notes |
|---|---|---|---|---|
| HUAWEI Mate 50 Pro | 〇 | 〇 |
| Model Name | Model Number | Roaming VoLTE Calls | Roaming SMS | Notes |
|---|---|---|---|---|
| 16e、17e/Air 、18 Series | MHRW4ZP/A TW/TH/VN Global Version（i18） | ❌ | 〇 | Unable to make calls while overseas, but SMS can be received after configuring the APN. |
| 6 、7、X、11、12、13、14、15、16、17 Series | Global Version | 〇 | 〇 |
| Model Name | Model Number | Roaming VoLTE Calls | Roaming SMS | Notes |
|---|---|---|---|---|
| OPPO Reno14 5G | CPH2737 | 〇 | 〇 | |
| OPPO Reno14 Pro | 〇 | 〇 | ||
| OPPO A79 5G | CPH2557(Global Version) | 〇 | 〇 |
| Model Name | Model Number | Roaming VoLTE Calls | Roaming SMS | Notes |
|---|---|---|---|---|
| Motorola Edge 60 Fusion | 〇 | 〇 |
| Model Name | Model Number | Roaming VoLTE Calls | Roaming SMS | Notes |
|---|---|---|---|---|
| Samsung Galaxy S Series | TW、US、HK、SG、AU | ❌ | 〇 | |
| Samsung Galaxy A Series | TW、US、HK、SG、AU | ❌ | 〇 |
| Model Name | Model Number | Roaming VoLTE Calls | Roaming SMS | Notes |
|---|---|---|---|---|
| AQUOS wish5 | SH-M32TW | 〇 | 〇 | |
| AQUOS R9 | SH-M28TW | 〇 | 〇 |
| Model Name | Model Number | Roaming VoLTE Calls | Roaming SMS | Notes |
|---|---|---|---|---|
| Xperia 1 V | XQ-DQ72 TW/HK | 〇 | 〇 |
| Model Name | Model Number | Roaming VoLTE Calls | Roaming SMS | Notes |
|---|---|---|---|---|
| vivo V29 5G (V2250)、vivo V40 5G、vivo Y55、vivo X300 | 〇 | 〇 |
| Model Name | Model Number | Roaming VoLTE Calls | Roaming SMS | Notes |
|---|---|---|---|---|
| Redmi 12C、Note 11 Pro+ 5G、Redmi Note 12 Pro+ 5G | 〇 | 〇 | Dial*#*#86583#*#* directly to enable or disable the VoLTE calling function. | |
| Xiaomi 12T | 〇 | 〇 | ||
| POCO F8 Ultra、POCO X8 Pro Max | 〇 | 〇 |
