24/7 Vietnamese support · Delivery across Japan
SKY MOBILESKY MOBILE
SIM DOCOMO 3GB + VOICE | FREE CALLS 24/24Best seller
3GB
Data
DOCOMO
Carrier
30d
Billing cycle

SIM DOCOMO 3GB + VOICE | FREE CALLS 24/24

SIM DOCOMO 3GB + VOICE is a cost-effective mobile plan that combines high-speed data, voice calling, and SMS on the reliable NTT Docomo network. With 3GB of high-speed data per month, an official Japanese phone number, and free domestic calls (subject to plan terms), it is an excellent choice for users who primarily rely on voice communication, use mobile data only when necessary, and frequently connect to Wi-Fi.

4.8Sold: 303
Monthly fee
¥3,960
First month fee
¥7,060
Next billing date08/25/2026
Billing for month 09 usage
Free shipping and activation fee when you sign up for a 6-month or 1-year plan

Category

Specification

SIM Type

Data + Voice SIM (Mobile Data & Voice Calls)

Network

DOCOMO

High-Speed Data

3GB per month

Network Technology

4G LTE / 5G (subject to coverage and device compatibility)

Voice Calls

Free domestic calls within Japan (subject to plan terms)

SMS

Supports sending and receiving SMS

Japanese Phone Number

Included (070 / 080 / 090)

SIM Size

Nano SIM

Compatible Devices

Smartphones and tablets with Nano SIM support

Coverage Area

Nationwide within the DOCOMO network coverage area

Specifications

CarrierDOCOMO
SIM typeData + Voice
Data3GB
Billing cycle30 days
CallsSupported
After data capReduced speed
CompatibilityInternational devices (SIM-free)
CoverageAll of Japan

How to activate

1Order the plan and receive your SIM or eSIM code
2Insert the SIM or scan the QR code
3Set up the APN and start using it
High-speed data — stream video & join calls freely
Hotspot support for multiple devices
No long-term contract, works with international devices

Additional Information

AN AFFORDABLE COMMUNICATION SOLUTION FOR VOICE-FOCUSED USERS

SIM DOCOMO 3GB + VOICE is designed for users who mainly use their phones for voice calls, while mobile data is only needed for essential tasks. It provides an economical monthly solution without sacrificing essential mobile services such as internet access, voice calling, and SMS.

With just one SIM card, users can stay connected, communicate easily, and enjoy the convenience of an official Japanese phone number for everyday life in Japan.

3GB OF HIGH-SPEED DATA FOR ESSENTIAL NEEDS

The plan includes 3GB of high-speed data every month, making it ideal for users who primarily connect to Wi-Fi at home, in dormitories, at work, or at school, and only need mobile data while on the go.

The monthly data allowance is suitable for:

  • Sending and receiving messages through LINE and Messenger.

  • Using Google Maps for navigation.

  • Checking emails.

  • Browsing websites and reading news.

  • Accessing online banking services.

  • Using train, bus, and transportation apps.

  • Receiving notifications from important applications.

This data allowance is perfect for users who prefer to minimize mobile data usage and rarely stream videos or download large files over cellular networks.

FREE DOMESTIC CALLS 24/24

One of the biggest advantages of this plan is free domestic calls within Japan, available 24/24 according to the plan's terms and conditions.

Ideal for:

  • Calling family and friends.

  • Contacting companies and schools.

  • Communicating with customers and business partners.

  • Scheduling medical appointments.

  • Contacting landlords or property management companies.

  • Handling everyday personal and work-related matters.

This makes the plan especially attractive for users who make frequent phone calls but have minimal mobile data requirements.

OFFICIAL JAPANESE PHONE NUMBER

The SIM includes an official Japanese phone number (070 / 080 / 090), making it easy to access a wide range of essential services while living in Japan.

It can be used for:

  • Receiving OTP verification codes.

  • Opening bank accounts.

  • Registering e-wallets.

  • Signing rental contracts.

  • Verifying online accounts.

  • Contacting government offices, schools, and businesses.

Having a local Japanese phone number makes administrative procedures and daily transactions much more convenient.

STABLE CONNECTION ON THE DOCOMO NETWORK

The SIM operates on the reliable NTT Docomo network, providing extensive nationwide coverage and dependable connectivity throughout Japan.

Compatible devices automatically connect to 4G LTE or 5G, depending on network availability and device compatibility, ensuring a stable internet experience wherever coverage is available.

SMS SUPPORT FOR ESSENTIAL SERVICES

The SIM supports sending and receiving SMS, making it suitable for a wide variety of verification and communication needs.

SMS can be used for:

  • Receiving OTP codes.

  • Bank account verification.

  • Registering payment applications.

  • Activating online services.

  • Two-factor authentication (2FA).

This is an essential feature for anyone living, studying, or working in Japan.

QUICK SETUP AND EASY TO USE

The SIM uses the Nano SIM format and is compatible with most modern smartphones.

After activation, simply insert the SIM into your device to start using:

  • High-speed internet.

  • Domestic voice calls.

  • SMS messaging.

  • Services requiring a Japanese phone number.

The setup process is simple and user-friendly, making it ideal even for people who have just arrived in Japan.

KEY BENEFITS

  • 3GB of high-speed data every month.

  • Free domestic calls within Japan 24/24.

  • Official Japanese phone number (070 / 080 / 090).

  • Supports sending and receiving SMS.

  • Reliable connectivity on the DOCOMO network.

  • Supports both 4G LTE and 5G.

  • Cost-effective for users with minimal mobile data needs.

  • Perfect for users who mainly rely on Wi-Fi and prioritize voice communication.