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  6. IIJ to Offer Voice eSIM for Individual Users of IIJmio Mobile Service Giga Plan Type D (NTT Docomo Network)

IIJ to Offer Voice eSIM for Individual Users of IIJmio Mobile Service Giga Plan Type D (NTT Docomo Network)

Will also support switching from physical SIM card with voice call functionality to Voice eSIM, and switching between Type A and Type D services

September 7, 2023
Internet Initiative Japan Inc.

PDF [302KB] / Japanese

TOKYO - September 7, 2023 - Internet Initiative Japan Inc. (TSE Prime: 3774), one of Japan's leading Internet access and comprehensive network solutions providers, today announced the availability from September 22, 2023 of an eSIM with voice call functionality ("Voice eSIM") for users of the IIJmio mobile service Giga Plan Type D (NTT Docomo network), an MVNO service aimed at individual customers.

IIJmio began Voice eSIM provision last October for its Type A (au network) service.(*1) Besides enabling service activation as early as the same day of purchase, the eSIM can be used as a backup in case of network trouble. These advantages have made it a popular choice and prompted numerous requests for Voice eSIM provision for Type D as well, a need being addressed with the new service offering. The monthly charges for Type D Voice eSIM service are the same as those for a physical SIM with voice call functionality and for Type A Voice eSIM service.

Timed with the start of the new service, IIJ will also support switching from a physical SIM card with voice call functionality to a Voice eSIM, as well as switching between Type A and Type D services. The ability to switch freely between a physical SIM and Voice eSIM, and between Type A and D services, will give customers the advantage of more flexible Giga Plan use based on the mobile device model, service area, carrier or other conditions.

Overview of Type D Voice eSIM

Available from

September 22, 2023

Basic monthly charge (tax included)

Plan (data limit) 2 GB 5 GB 10 GB 15 GB 20 GB
Voice eSIM
(data transfer + voice call functionality/Type D)
JPY850 JPY990 JPY1,500 JPY1,800 JPY2,000

Type D Voice eSIM charges are the same as those for a physical SIM with voice call functionality and for Type A Voice eSIM service.

Other fees (tax included)

Initial fee JPY3,300
Fee for issuing SIM profile JPY433.4
Universal service fee JPY2.2 per month
Voice call charges JPY11 per 30 seconds
mio discount A discount of JPY660 per month is available when this service is subscribed to along with IIJmio Hikari.(*)
  • (*)The discount of JPY660 is applicable to one IIJmio Hikari line, regardless of the number of Giga Plan subscriptions.

How to sign up

  • Sign up for an account on the IIJmio website.
  • Purchase a package at an electronics store, convenience store or other retail outlet and use it to sign up on the IIJmio website.

To activate a Type D Voice eSIM, a serial number (EID)(*2) needs to be entered on the mobile device. In the signup procedure, after the customer's identity is confirmed and the EID is entered on the device, an activation code is shown on a members-only web page (for eSIM use). This code is read by the eSIM-conformant device in which the EID was entered. Once the SIM profile has been downloaded, the service can be used.

  • (*2)An EID (Embedded Identity Document) is an identifier required for eSIM use. It can be found in the setup information for the mobile device or on the package, etc. Note that during the activation procedure, if the EID is not entered within a certain time period, the application will be canceled.
  • (*)In the case of an iPhone, eSIM carrier activation can be used, enabling the SIM profile to be downloaded without the step of reading the activation code.

Overview of SIM switching/SIM type switching

SIM switching, between a physical SIM card with Giga Plan voice functionality and a Voice eSIM, can be performed on the IIJmio members-only web page, as well as type switching between Voice eSIM Type A and Type D.

Available from

September 22, 2023

SIM switching fee (tax included)

JPY2,200 per SIM card/SIM profile

  • (*)Fees for SIM card issuance (JPY433.4 per SIM card for Type D, JPY446.6 for Type A) and for SIM profile issuance (JPY433.4 per SIM profile for Type D, JPY220 yen for Type A) are charged additionally.

List of SIM switching charges

  • Switching from physical SIM with voice call functionality to Voice eSIM
  • Switching from Voice eSIM to physical SIM with voice call functionality
  • Type switching (changing from Type A to Type D, or from Type D to Type A)
Procedure SIM card/eSIM SIM switching fee (tax included) SIM card issuing fee/SIM profile issuing fee (tax included; charged separately)
SIM card switching
(changing from physical SIM card with voice call functionality to Voice eSIM, or from Voice eSIM to physical SIM card with voice call functionality)
Switching from SIM card to eSIM (voice) JPY2,200 per SIM profile Per SIM profile
  • Type D: JPY433.4
  • Type A: JPY220
Switching from eSIM to SIM card (voice) JPY2,200 per SIM card Per SIM card
  • Type D: JPY433.4
  • Type A: JPY446.6
SIM card type
switching (changing from Type A to Type D, or from Type D to Type A)
SIM card JPY2,200 per SIM card Per SIM card
  • Type D: JPY433.4
  • Type A: JPY446.6
Voice eSIM JPY2,200 per SIM profile Per SIM profile
  • Type D: JPY433.4
  • Type A: JPY220

Please see the following site for details.

IIJ will continue to expand its new service offerings aimed at further improving customer satisfaction and convenience.

About IIJ

Founded in 1992, IIJ is one of Japan's leading Internet-access and comprehensive network solutions providers. IIJ and its group companies provide total network solutions that mainly cater to high-end corporate customers. IIJ's services include high-quality Internet connectivity services, systems integration, cloud computing services, security services and mobile services. Moreover, IIJ has built one of the largest Internet backbone networks in Japan that is connected to the United States, the United Kingdom and Asia. IIJ was listed on the Prime Market of the Tokyo Stock Exchange in 2022.

The statements within this release contain forward-looking statements about our future plans that involve risk and uncertainty. These statements may differ materially from actual future events or results.

For inquiries, contact

IIJ Corporate Communications

  • (*) All company names and service names used in this press release are the trademarks or registered trademarks of their respective owners.

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