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SonixNet SIM

Looking for low-price and reliable mobile services?

Using NTT DOCOMO’s vast and comprehensive mobile network, SonixNet SIM delivers unmetered and 5GB data plans through Freebit/Bekkoame’s internet connection at the most friendly prices on the market.

SMS and Voice plans are also available at a discounted price.

SonixNet SIM is most compatible with various unlocked SIM-free smartphones or pocket Wi-Fi devices (see here for a full list of tested devices)

Unmetered Data Plans

With unmetered data plans, the monthly data usage (DL/UL) is not accounted for. If your accumulated total data consumption within 3 days exceeds 3GB, your bandwidth will be throttled down to a maximum speed of 200kbps until the 3-day total falls under 3GB.

*With the 5GB plan, after exceeding the limit, the connection speed will be throttled to under 200kbps for the rest of the month.

5GB Unmetered
Data Only 1,500 JPY 3,200 JPY
Data+SMS 1,700 JPY 3,400 JPY
Data+SMS/Voice 2,800 JPY 3,900 JPY

*Above shows recurring monthly basic fee. An account activation fee of 3,000 JPY (one-time) applies separately upon application.

*Pay-per-use calling/SMS charges apply separately. See below for details.

*Basic fee of first billing month (day of sign-up to end of month) is free. Billing commences on 1st of following month.

*Minimum contract period is 3 months. Cancellations can be accepted after the 3rd month of contract.

*Switching between plans require an administrative fee of 3,000 JPY.

*Discount of 300 JPY applies to the monthly basic fee of the second (or more) Voice SIM application(s).

Domestic Calls 20 JPY / 30 sec
Domestic SMS 3~ JPY / message
International SMS 100~JPY / message

*International calls are disabled by default. If enabled, rates will be subjected to NTT DOCOMO’s rates (check here – Japanese only)

*Incoming calls/SMS are free.

*International SMS = sending an SMS to an overseas number from a location within NTT DOCOMO’s service area in Japan.

*SMS are restricted to approximately 150 single-byte characters per message.

Call Waiting +300 JPY / month
Voice Mail +300 JPY / month
Enable International Calling* Free
“Unlimited 15 (Domestic)” Free Calling** +1300 JPY / month

* This option gives you the ability to call international numbers from inside Japan (disabled by default).
Calling charges apply separately (eg. North America ¥34/30sec, Europe ¥108/30sec
A limit of 20,000JPY / applies to the monthly international calling charges (upgrade available).

** All calling/SMS fees are charged separately.
If you are a frequent domestic caller, we recommend our “Unlimited 15” option. This makes an unlimited number of domestic calls up to 15 minutes FREE, and discounts rates for minutes of domestic calls exceeding 15 minutes. For details on the discounted rates please see our website.
To be eligible for the free/discounted rates, all calls must be made by adding the prefix “0063” or through the “Freebit Otoku Call” smartphone app.
Only for this option, the base fee (1,300JPY) of the first month is prorated and charged upon activation.

SonixNet SIM Application Form
Application Form (for 2nd SIM card)
APN Setup Guide (iOS)
APN Setup Guide (Android)
Voicemail Service Instruction
Unlimited 15 (Domestic) Calling Rates
Read full Terms of Service here