SIM Card Compatibility

SIM Card

Using NTT DOCOMO’s vast mobile network, we deliver one of the most cost-friendly SIM card services in Japan.


NTT Docomo’s Vast Cellular Network

Best area coverage among the main three carriers in Japan.

Affordable Plans

We provide plans at the most friendly prices on the market.

Easy Registration

Apply online presenting a photo ID and it will be ready for pickup/shipping.

Foreign Credit Cards Accepted

We accept both foreign and Japanese credit cards unlike other SIM providers.

No Annual Commitments

Our minimum contract period is 4 months (1st month free + 3 billing months).

Easy Contract Transfer

You can easily switch over to our service keeping your current phone number.


The plans below are available for all eSIM and SIM card sizes (Nano, Micro and Standard). Our SIM cards are provided in 3in1 style which you can hallow out on the first use.

Activation Fee (One Time)
NTT Installation Fee (One Time)
1,500 JPY per SIM Card

#Prices shown above are excluding 10% consumption tax.

Monthly Fees (Recurring)

Basic Service

Plans Data + SMS/Voice Data Only Activation Fee
5 GB per month 1,880 JPY 1,400 JPY
1,500 JPY 
10 GB per month 1,980 JPY 1,800 JPY
25 GB per month 3,280 JPY 3,200 JPY
50 GB per month 4,480 JPY 4,400 JPY
No data 980 JPY

Discount Service

Multiple SIM Discount (Recurring)
-300 JPY per SIM Card

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

Optional Service

Call Waiting (Recurring)
300 JPY per SIM Card
Voice Mail
300 JPY per SIM Card

* Pay-per-use calling/SMS charges apply separately. See below for details. Any calls/SMS texts made during a billing cycle (billing cycle = 1st to the end of the month) are charged 5-6 weeks after. * Basic fee of first month (day of sign-up to end of month) is free. Billing commences on the 1st of the following month. * Minimum contract period is three full billing months (first month does not count as a billing month). Cancellations can be accepted after the 3rd month of contract. Cancellation must be requested online and the service will be terminated at the end of the billing cycle. * Switching between data plans (5GB) can be done for no additional charge and the change takes effect on the 1st of the following month. *Switching between voice plans (Data-only or Data+SMS/Voice) require the SIM card to be replaced, therefore is considered as a cancellation of the existing subscription and application under the new plan. Cancellation policies apply. * If the SIM card is damaged / lost or requires replacement for any other reason, a reissue fee of 1,500 JPY will incur.

#Prices shown above are excluding 10% consumption tax.

Calling Rates

Sample Rates

Domestic International
10 6 14 9 10 13 8 29 16

Table shows JPY per 30 seconds. SMS is 3JPY per message. Incoming calls/SMS are free. * SMS texts are 3JPY (domestic) or 100JPY (to international) per message. SMS are restricted to approximately 150 single-byte characters per message.

International Calling

To call international, dial: 0063-(country code)-(phone number).

* International Call = calling an overseas number from a location within NTT DOCOMO’s service area in Japan, using the prefix “0063” or the “Otoku Call” smartphone app. International calls are not taxed.
* International SMS = sending an SMS to an international number from a location within NTT DOCOMO’s service area in Japan.
* Service is intended for use in Japan only. International roaming is not provided.

For full description, visit the PDF file: International Calling Rates

Unlimited Calling

Unlimited Calling can be offered to Data+SMS/Voice plans, to avert pay-per-use calling charges, at a flat rate of an additional 3,000JPY/month to the monthly fee of the base plan. This option can be activated/deactivated only on the 1st of each month, and requires notice by the 25th of the previous month. Unlimited calls pertain to standard domestic calls only. Calls to certain numbers and international numbers are not included in the unlimited calling plan.

#Prices shown above are excluding 10% consumption tax.


What is an eSIM?

An eSIM (embedded SIM) is a digital SIM card built into some smartphones. It can be programmed remotely to receive our plans. Before applying, a client must prepare a compatible smartphone and its EID, along with a credit card and piece of ID.

* An EID is a 32-digit number that can be found in the smartphone settings. We accept EIDs that start with 89049032, 89033023, 89033024, 89043051, 89043052

* Whenever the EID changes, the eSIM needs to be re-issued (fee = 1,500JPY) * If the downloading process of the eSIM plan is interrupted, or if the eSIM plan is deleted from the smartphone, the eSIM needs to be made re-downloadable on the system (fee = 1,500JPY) * After the eSIM plan is downloaded to the smartphone, you must install our APN profile to access the cellular data.

Important Information

Additional Notices

Additional Notices

SonixNet provides their services only to those whose identification is verified with official/legal documents with the user’s name, date of birth, residential address, and photograph stated. An application without presentation of a valid ID is void.

A compatible device is required to be prepared by the user. A list of tested compatible devices is available on Assist Solutions website. Assist Solutions cannot be held liable for issues caused by incompatibility.

Service may not be available in areas which signals are difficult to reach. For information, see details by NTT Docomo

If SIM card is damaged/lost and requires replacing, a fee of 1,500 JPY is incurred.

Call waiting and voice mail can be activated as separate paid options.

Calling and SMS charges are pay-per-use and are incurred separately. Unlimited Calling option offers a flat rate to domestic basic calls. A full description can be found on Assist Solutions website.

Data service is not suitable for contents and activities that require continuous large amounts of data transfer. SonixNet will not be responsible for any damages and inconveniences caused by bandwidth cappings.

SIM is activated as 4G by default. Activating 5G can be requested via Assist Solutions/SonixNet SIM client portal website.

International cellular/data roaming are disabled by default. International roaming can be enabled at request only for calling/texting. Pay-per-use charges are incurred separately. Full description of international calling rates can be found on NTT Docomo’s website. A limit of 50,000 JPY monthly is applied to roaming calling charges (upgrades available upon request). International data roaming cannot be provided. Unlimited Calling option does not pertain to international usage.

Service cancellations must be requested to Assist Solutions with a designated cancellation form. SIM card is to be returned to Assist Solutions. Monthly fee of cancellation month is incurred in full, and cannot be prorated. Pay-per-use fees are invoiced approximately two months after, and a user is required to maintain a valid credit card on file until the final payments are completed.

SonixNet SIM Terms of Service

SonixNet SIM Terms of Service

SonixNet SIM is a versatile data communications service coping with the area of NTT Docomo’s Xi and FOMA.

Application and subscription renewal is to take place on SonixNet website.

The SIM card enclosed in this package is delivered to the user after its activation is completed.

According to the purchase of Assist Solutions’ service, in no circumstances will the customer be able to return, refund, exchange, or reissue a purchased service package.

The customer cannot cancel their subscription to the service within the minimum contract term of three months, return the subscription bundle, or request for a refund, after the purchase procedure for the SIM card is completed, regardless of the data usage.

The customer must register with a valid email address upon subscribing to the service. The customer must notify Assist Solutions immediately if the email address is changed.

If the customer’s email address is invalid, Assist Solutions can terminate the customer’s subscription without prior notice.

Payment for SonixNet SIM service is by credit card payment only. A change of credit card must be notified to Assist Solutions immediately.

Regardless of the inability to receive service due to weak signal within or outside a coverage area, charges associated with the service, such as activation fee, device rental fee, and monthly access fee will accrue.

Failure of payment can result in account termination. Terminations can take place without prior notice to the customer.

The SIM card is for rental. Any modifications on the SIM card such as cutting and reshaping without permission are strictly prohibited.

The rental SIM card is to be returned to Assist Solutions after termination of the account.

According to the purchase and use of Assist Solutions services, the customer may not belong to any of the following. If the customer belongs to any of the following, SonixNet and Assist Solutions will be obliged to terminate the service and cancel the purchase of the SIM card with immediate effect:

  • Gang group;
  • Member of gang;
  • Associate member of gang group;
  • Associate corporation of gang group;
  • Corporate racketeer;
  • Socialist movement organization;
  • Organized crime syndicate;
  • Anyone that may belong to or be associated with 1-7.

If a customer behaves in anything that corresponds with the following, Assist Solutions can refuse to serve or sell products:

  • violent behavioral demands;
  • demands that peak legal responsibilities;
  • violent actions or threats regarding the contract;
  • spreading rumors that may affect SonixNet / Assist Solutions’ trust and disturb its sales.

Resale of SonixNet products is strictly prohibited.


What is the service contract period?

The minimum service requirement period is activation month + 3 billing months. After this period, the service will switch to a monthly service and you will be able to cancel at the end of each month.

I’ve changed my phone and the SIM card is not working on the new device.

Whenever the SIM card is used with a new device, the APN profile would need to be installed on said device. Please refer to the APN Setup Guide in the Documents section to check how the profile can be installed.

Are international calling features available?

Yes, by adding the prefix “0063” in front of the number that you would like to call, you will be able to make International calls with the SIM card. An application called “Otoku Call” by Freebit can also be used to make the calls. Calls made through this app will automatically have the 0063 prefix added in front of the number. *Overseas use for our SIM card is disabled by default.

How do I cancel the service?

To cancel, please log into the SonixNet SIM Management Website and send us a cancellation request before the 25th to cancel your account at the end of the month. For example, cancellation requests will need to be sent in by May 25th, in order to cancel at the end of May.

iPhone 15 Series (Standard/Plus/Pro/Pro Max)
iPhone 14 Series (Standard/Plus/Pro/Pro Max)
iPhone SE 3 (2022)
iPhone 13 Series (Standard/Mini/Pro/Pro Max)
iPhone 12 Series (Standard/Mini/Pro/Pro Max)
iPhone SE 3 (2020)
iPhone 11 Series (Standard/Pro/Pro Max)
iPhone XS Series (Standard/Max)
iPhone XR
iPad (only iPads with 4G connectivity)
iPad Pro 11″ (model A2068, from 2020)
iPad Pro 12.9″ (model A2069, from 2020)
iPad Air (model A2123, from 2019)
iPad (model A2198, from 2019)
iPad Mini (model A2124, from 2019)
iPad 10th generation (model 2022)
Samsung Galaxy S20+
Samsung Galaxy S20+ 5G
Samsung Galaxy S20 Ultra
Samsung Galaxy S20 Ultra 5G
Samsung Galaxy S21
Samsung Galaxy S21+ 5G
Samsung Galaxy S21+ Ultra 5G
Samsung Galaxy S22
Samsung Galaxy S22+
Samsung Galaxy S22 Ultra
Samsung Galaxy S23
Samsung Galaxy S23+
Samsung Galaxy S23 Ultra
Samsung Galaxy Note 20
Samsung Galaxy Note 20 Ultra 5G
Samsung Galaxy Fold
Samsung Galaxy Z Fold2 5G
Samsung Galaxy Z Fold3 5G
Samsung Galaxy Z Fold4
Samsung Galaxy Z Fold5 5G
Samsung Galaxy Z Flip
Samsung Galaxy Z Flip3 5G
Samsung Galaxy Z Flip4
Samsung Galaxy Z Flip5 5G
Samsung Galaxy S21 5G
Samsung Galaxy A23 5G
Samsung Galaxy Note 20 5G
Samsung Galaxy S21 Ultra 5G
Samsung Galaxy Z Flip 5G
Samsung Galaxy S20 5G
Samsung Galaxy Note 20 Ultra
Samsung Galaxy A54 5G
Google Pixel 2 (only phones bought with Google Fi service)
Google Pixel 2 XL
Google Pixel 3 (not including phones bought in Australia, Taiwan or Japan. Phones bought with US or Canadian carriers other than Sprint and Google Fi don’t work with eSIM)
Google Pixel 3 XL
Google Pixel 3a (not including phones bought in Japan or with Verizon service)
Google Pixel 3a XL
Google Pixel 4
Google Pixel 4a
Google Pixel 4 XL
Google Pixel 5
Google Pixel 5a
Google Pixel 6
Google Pixel 6a
Google Pixel 6 Pro
Google Pixel 7
Google Pixel 7 Pro
Google Pixel 8
Google Pixel 8 Pro
Google Pixel Fold
Google Pixel 4a (5G)
Google Pixel 7a
Huawei P40
Huawei P40 Pro
Huawei Mate 40 Pro
Oppo Find X3 Pro
Oppo Find N2 Flip
Oppo Reno 5A
Oppo Reno 6 Pro 5G
Oppo Reno 9A
Oppo Find X5
Oppo Find X5 Pro
Oppo A55s 5G
Sony Xperia 10 III Lite
Sony Xperia 10 IV
Xperia 10V
Xperia 1 IV
Sony Xperia 5 IV
Sony Xperia 1 V
Sony Xperia Ace III
Xiaomi 12T Pro
Xiaomi 13
Xiaomi 13 Lite
Xiaomi 13 Pro
Xiaomi 13T Pro
Motorola Razr 2019
Motorola Razr 5G
Motorola Razr 40
Motorola Razr 40 Ultra
Motorola Razr+
Motorola Edge+
Motorola Edge 40
Motorola Edge 40 Pro
Motorola G52J 5G
Motorola G52J 5G II
Motorola G53J 5G
Sharp AQUOS sense4 lite
Sharp AQUOS Sense6s
AQUOS sense 7
AQUOS sense 7plus
Sharp AQUOS Wish
AQUOS wish 2 SHG08
AQUOS wish3
AQUOS zero 6
Simple Sumaho6
Sharp AQUOS R7
Sharp AQUOS R8
Sharp AQUOS R8 Pro
Gemini PDA
Rakuten Mini
Rakuten Big-S
Rakuten Big
Rakuten Hand
Rakuten Hand 5G
Surface Pro X
Honor Magic 4 Pro
Honor Magic 5 Pro
Honor 90
Honor X8
Fairphone 4
OnePlus 11
HAMMER Blade 3
Nokia XR21
Nokia X30
Nokia G60 5G
myPhone NOW eSIM
Vivo X90 Pro


APN Setup Guide (iOS)

APN Setup Guide (Android)

eSIM Setup Guide

Voicemail Service Instruction

Device Compatibility List


By Online Form (Anytime)

By Chat (Anytime)

Click bottom right “Chat Button” ↘️

By Phone (9:30-18:00 JST)

Toll Free within Japan


From Overseas (Incur Overseas Calling Rates)



Subway Oedo Line / Nanboku Line
Short distance walk from exit 6
of Azabu-Juban Station
(1F of our building is Domino’s Pizza)


3F Azabu Maruka Bldg.,
3-8-2 Higashi Azabu, Minato-ku,
Tokyo 106-0044
Tel: 03-3560-1006 Fax: 03-3560-1007