Unlimited Calling Plan(3G Mobile phone・Data)

Notice regarding ending of acceptance of new applications

As of November 7, 2018 (Wed.), new applications are no longer accepted for CDMA 1X WIN, au's communications service for 3G mobile phones.
As a result, starting November 8, 2018 (Thu.), customers can no longer apply for the price plans for 3G mobile phones, smartphones, and other data communications devices on this page.
* Customers may still apply for changes to price plans for 3G mobile phones, smartphones, and other data communications devices.

Check here for details.

New application acceptance period for the CDMA 1X WIN service ending(Japanese only)

Unlimited domestic calls 24 hours a day! This plan is recommended for users who frequently use both voice calls and data communications.
Great savings for mobile phone users too with au Smart Value!

Application Required


The Unlimited Calling Plan(3G Mobile phone・Data) must be subscribed in combination with Flat-rate Data. A subscription to EZ WIN Course (¥300/month) is required for internet connection.

Rate plan image

Basic charge

Monthly basic charge When 2-year contract [1] is applied ¥2,200
Before application for various discount services ¥3,700
Domestic calling charge To au mobile phones Free [2]
To other carriers' mobile phones or landline
Domestic Data communications charge Flat-rate Data ¥3,500 [3]
Domestic SMS (C-mail) To au mobile phones Sending: ¥3/time Free for family members [4]
Receiving: Free
To other carriers' mobile phones and PHS
  • [1]2-year contract is automatically renewed in two-year units. In the case of contract termination, a contract cancellation fee of ¥9,500 is incurred (excluding the renewal period).
    The following discount services also apply.
    -Monthly basic charge when 2-year contract (No automatic renewal) is applied... ¥2,500/month
    • * The month following the month of application is counted as the first month, and a contract cancellation fee (¥9,500) is incurred if the contract is cancelled within 2 years.
    -Monthly basic charge when Smile-heart Discount is applied... ¥2,000/month
  • [3]If using a 3G smartphone, the data charge is a maximum of ¥5,700 (¥0.08/packet). If using PC Site Viewer on an au mobile phone, the data charge is a maximum of ¥5,700/month, and if connecting to a mobile PC, PDA, car navigation system, or other device, the data charge is a maximum of ¥9,900/month (¥0.08/packet).
    Data communications charges are not eligible for the Flat-rate Data flat rate and maximum charges. Two-step data flat for Overseas applies only when automatically connected to an eligible telecommunications carrier.
    Two-step data flat for Overseas
  • [4] Sending SMS (C-mail) to family members within Japan is free when Family Discount is applied.

Even greater savings when combined with au Smart Value! Click here for details

Eligible models

  • Feature Phone
  • 3G Smartphones

Universal service system

In accordance with the launch of the "Universal Service System", KDDI has begun imposing a "Universal Service Fee" on customers who signed contracts with us for their portion of usage since January, 2007.
See below for the details.

Universal service system


[Unlimited Calling - Domestic flat-rate voice call service]

  • [2]Flat-rate voice calls with this plan do not apply to voice calls to phone numbers starting with 0180, 0570 or other numbers that are charged by other carriers, voice calls to directory assistance (104), 1XY administration number services (188/189), SMS transmissions, voice calls to satellite phones/ship satellite phones, and voice calls to phone numbers that KDDI separately determines. Also, international calls and calls made to and from overseas are not applicable.
    In addition, calls that fall under the following situations and all the other calls made from that line are not covered by flat-rate voice calls with this plan, nor are any discount call services applicable other than this plan.
  • When using a mobile phone subscribed to this plan to connect to the customer's own communications equipment or to make an automatic call using software (except with the prior approval of KDDI in either case)
  • When using Unlimited Calling with the aim of gaining direct income from communications through communication mediation, use of the forwarding function or connecting to a service provided by another company

[Application of Charges]

  • * If applying when making a new subscription or switching models, the rate plan and Flat-rate Data service become applicable from the date of subscription or the date of switching models (the basic charge is prorated). If changing the contract, it becomes applicable from the month following the month of the change. If changing the contract or switching to a model you bring to a shop, the service becomes applicable from the month following the month of the change or switch. If you cancel in the middle of a month, the rate plan and Flat-rate Data service charges are not prorated and the flat rate is incurred (If not subscribed to 2-year contract or 2-year contract (No automatic renewal), the basic charge is prorated.).
  • * Check for other costs arising from the contract at the store.

[Communication speed restrictions for 3G communications]

  • * If packet communication charges reach a significant amount, phone lines may be temporarily suspended even if subscribed to the Flat-rate Data service.
  • * To avoid network congestion, a limit will be placed on communications speed for a whole day if you have used more than 3,000,000 packets over the three most recent days (not including the day on which the restriction is applied). The restricted speed will differ depending on data traffic conditions. In addition, other restrictions, such as a maximum character length or attachment file size per EZweb email and a maximum daily data communication volume of EZ apps, are applied according to conditions for providing these services.
  • By phoneOpen 9:00 – 20:00

    • English

      0120-959-472(Toll Free)

    • Portuguese

      0120-959-473(Toll Free)

    • Chinese

      0120-959-476(Toll Free)

    • Korean

      0120-959-478(Toll Free)

    • Tagalog

      0120-933-952(Toll Free)

    • Vietnamese

      0120-933-961(Toll Free)

    • Japanese

      157(Toll Free)from au phones

      0077-7-111(Toll Free)

  • By e-mailSend e-mail