au Flat Plan

Perfect amount
of data!

¥5,500/month(20GB)
* When au Flat Plan 20 (Unlimited Calling Plan S) +
EverybodyDiscount (★1) + au Smart Value are applied

au Flat Plan is a flat rate plan for 4G LTE smartphones for users that use a lot of data.

Image of au Flat Plan payment

When au Flat Plan 20/30 (Unlimited Calling Plan S) + Everybody Discount + Big News Campaign + au Smart Value are applied

Monthly charge

Application

Required

Eligible models

4G LTE smartphone (*), AQUOS K SHF31

  • When purchasing an iPhone 7/iPhone 7 Plus/iPhone 6s/iPhone 6s Plus/iPhone SE/iPhone 6/iPhone 6 Plus/iPhone 5s/iPhone 5c/iPhone 5 with a new contract or by changing models, this plan and the Big News Campaign are not eligible. (You can only subscribe by changing rate plans.)
  • For devices purchased from July 14, 2017, plan changes between au Adjust Plan / au Flat Plan and other rate plans will not be possible from February 2018 (excludes changes due to model purchases).

Data amounts and 3 types of selectable plans based on voice calling style

au Flat Plan

(Unlimited Calling Plan S)

au Flat Plan

(Unlimited Calling Plan)

au Flat Plan

(Simple)

Unlimited domestic voice calls 24 hours a day! [1] (up to 5 minutes)

  • When Everybody Discount + Family Discount are applied, voice calls between family members are free. [2]

Unlimited domestic voice calls 24 hours a day! [3]

Pay only the amount used for domestic voice calls

  • Domestic voice calling charge of ¥20/30 seconds [4] is separately incurred.
  • When Everybody Discount + Family Discount are applied, voice calls between family members are free. [2]
  1. ◎For au Flat Plan (Unlimited Calling Plan S), you can make unlimited domestic voice calls that last up to 5 minutes. If a voice call is longer than 5 minutes, a separate calling charge of ¥20/30 seconds is applied to the portion that exceeds 5 minutes.

    ◎Does not apply to some voice calls, even if the call is within 5 minutes.

  1. When Everybody Discount (Smile-heart Discount or Everybody Discount Light) + Family Discount are applied, calls made to family members who are subscribed to the same Family Discount are free.
  2. Does not apply to some voice calls.
  3. Voice calls to ship satellite phones are ¥50/30 seconds. Also, calls to phone numbers that are charged by other carriers incur the specified voice calling charge.

Image of a monthly payment

au Flat Plan (Unlimited Calling Plan S)

Monthly data amount

Usage fee [5] [6]

When Everybody Discount (★1is applied

au Smart Value (★3)

Total

20GB

¥6,500/month

-¥1,000/month

permanently

¥5,500/month

  • ¥4,500/month for up to a year [10]

30GB

¥8,500/month

¥7,500/month

  • ¥6,500/month for up to a year [10]

au Flat Plan (Unlimited Calling Plan)

Monthly data amount

Usage fee [5] [7]

When Everybody Discount (★1) is applied

au Smart Value (★3)

Total

20GB

¥7,500/month

-¥1,000/month

permanently

¥6,500/month

  • ¥5,500/month for up to a year [10]

30GB

¥9,500/month

¥8,500/month

  • ¥7,500/month for up to a year [10]

au Flat Plan (Simple)

Monthly data amount

Usage fee [5] [8] [9]

When Everybody Discount (★1) is applied

au Smart Value (★3)

Total

20GB

¥6,000/month

-¥1,000/month

permanently

¥5,000/month

  • ¥4,000/month for up to a year [10]

30GB

¥8,000/month

¥7,000/month

  • ¥6,000/month for up to a year [10]
  • When subscribed to this rate plan, Monthly Discount is not applied.
  1. When Everybody Discount Light (★2) (2 year contract, No automatic renewal) is applied, the basic charge is +¥300/month. When not subscribed to a discount for continuous usage, the basic charge is +¥1,500/month.
  1. The total amount for au Flat Plan (1) basic charge + (2) LTE NET + (3) data flat rate .

    Breakdown:

    1. <¥1,480/month (when Everybody Discount is applied)><¥1,780/month (when Everybody Discount Light is applied)><¥2,980/month (when not subscribed to a discount for continuous usage)>
    2. <¥300/month>
    3. <¥4,720/month (20GB)><¥6,720/month (30GB)>
  2. The total amount for au Flat Plan (1) basic charge + (2) LTE NET + (3) data flat rate .

    Breakdown:

    1. <¥2,480/month (when Everybody Discount is applied)><¥2,780/month (when Everybody Discount Light is applied)><¥3,980/month (when not subscribed to a discount for continuous usage)>
    2. <¥300/month>
    3. <¥4,720/month (20GB)><¥6,720/month (30GB)>
  3. The total amount for au Flat Plan (1) basic charge + (2) LTE NET + (3) data flat rate .

    Breakdown:

    1. <¥980/month (when Everybody Discount is applied)><¥1,280/month (when Everybody Discount Light is applied)><¥2,480/month (when not subscribed to a discount for continuous usage)>
    2. <¥300/month>
    3. <¥4,720/month (20GB)><¥6,720/month (30GB)>
  4. Domestic voice calling charge of ¥20/30 seconds is separately incurred. Voice calls to ship satellite phones are ¥50/30 seconds. Also, calls to phone numbers that are charged by other carriers incur the specified voice calling charge.
  1. Amount when the Big News Campaign is applied.

[Domestic SMS] Sending: ¥3/mail (up to 70 characters) | Receiving: Free

  • Depending on the model, up to 670 double-byte characters can be sent and received. However, a transmission charges are incurred in the form of 2 mails for up to 134 characters and 1 mail for each subsequent amount of 67 characters.

Inquiries

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.

Notes

★1: Everybody Discount 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).
★2: 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.

The following discount services also apply.

  • Monthly basic charge when Smile-heart Discount is applied...-¥200/month from when Everybody Discount is applied

★3: The discount is applied from the month following the month in which an application for au Smart Value is made.

[About Unlimited Calling Plan S and Unlimited Calling Plan voice calls]

  • 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, flat-rate voice calls with this plan may not apply in the following situations.
    • 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
    • When using Unlimited Calling for purposes other than voice calls
  • A calling charge of ¥20/30 seconds is incurred for domestic calls that are not eligible for free calls if other carriers do not set their rate (Satellite calls to ships incurs a charge of ¥50/30 seconds).
  • Calling charge discounts that are provided by "Everybody Discount (Smile-heart Discount or Everybody Discount Light) + Family Discount" or "au → My Home Discount (if free)" are applied. Calling charge discounts that are provided by "au → My Home Discount (50% discounts)", "Smile-heart Discount", and other discount services are not applied. Calls that exceed 5 minutes incur a calling charge of ¥20/30 seconds.
  • Should KDDI judge, for example, that a continuous call for a long period of time is affecting KDDI equipment, the call in question may be terminated.
  • Numbers that are specified by KDDI (such as the ones that are connected when using a telephone service provided by a carrier other than KDDI, and the ones that are continuously connected for a specified period for long-term or multiple communications due to a call that originates by a mechanical nature) are not eligible for flat-rate calls.

[About data communication]

  • If using World Data Flat, the data amount is consumed from the monthly data amount of the domestic data flat rate service. If using Two-step data flat for Overseas, charges are incurred for communications used overseas. Does not apply to use of domestic monthly data amount.
  • au Flat Plan is not eligible for Data Gift or Long Term Hospitality Data Gift.
  • If applying for the Tethering Option, the monthly charge is ¥500/month. Free of charge until March 2018 through the campaign. When the free period ends, normal charges are automatically applied.
  • The usage fee for au Wi-Fi SPOT is ¥500/month. Free of charge until March 2018 through the campaign. For usage from April 2018, a separate application is necessary.

[About au Adjust Plan charges]

  • To connect to the internet, a subscription to LTE NET (¥300/month) or LTE NET for DATA (¥500/month) is required. If using an Android mobile phone from another carrier, you can only select LTE NET for DATA (¥500/month).
  • If you apply to au Flat Plan, you must subscribe to Data Charge (free).
  • If you are subscribed to this plan, all currently applied discounts may be terminated.
  • Contracts for prepaid phones are not eligible.
  • Safety Access Service / Restriction on Web Use are not available. Customers using these services must terminate the service (at au Shops and PiPit (excluding some locations)). Use Security Filter for au.
  • If applying when making a new subscription or switching models, the rate plan becomes applicable from the date of subscription or the date of switching models (the basic charge/Flat-rate data charge is prorated). 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 your contract in the middle of the month, the basic charge is not prorated and flat rate is incurred (During the period from the start of this plan until the date that KDDI will separately notify on the au homepage, the basic charge will be prorated if you are not subscribed to Everybody Discount or Everybody Discount Light.).
  • au Flat Plan is not eligible for Monthly Points (the service that awards 10 points for every ¥1,000 spent on au mobile phone usage fees, etc.).

    For usage from July 2017 to December 2017, some points awarded by au STAR Royal will be awarded as Monthly Points Remaining au STAR Royal points will be collectively awarded in January 2018. Afterward, points will be awarded each month. 

[Restrictions of communication speed]

  • If the total amount of communications of the month exceeds the data quantity for that month, the maximum communications speed for sending and receiving until the end of that month will be 128 kbps. (The communications speed constraint will be removed on the first day of the following month.)
  • Data amounts purchased with a data charge can be used without communication speed restrictions.
  • To avoid network congestion, a limit may be placed on the communication speed for a whole day if the total amount of communication used exceeds 6GB 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.

    (The restriction applies regardless of the remaining data amount.) 

  • Regardless of whether you are subscribed to a Flat-rate Data service, your line may be temporarily suspended if the cost of the packet communications you use becomes high.

[Communication amount notification]

  • If you exceed the use of a determined communication amount in a month and you are nearing the communication speed restriction, you will receive a notification to the e-mail address registered to your au ID.

[Optimization of communication]

  • LTE NET series packet communications may perform system optimization to improve the display speed of images and the waiting time before video playback begins.
    • Image files : BMP, jpg, gif, PNG formats
    • Video files : MPEG, AVI, MOV, FLV, MP4, 3GP, WebM, ASF, WMV formats
  • HTTPS communications and files with email attachments are not optimized.
  • Customers who do not need communication optimization can contact the Customer Center (157) to have optimization cancelled.
  • Optimization is the compression and conversion of images to the appropriate size for a smartphone screen. Compressed and converted data can not be restored.
  • Details may change depending on the application period.
  • This service may not be available in combination with certain KDDI deals.
  • Calling charges, communication charges, option charges, the universal service fee, and other charges are separately incurred.
  • Please check at your local au shop for the costs involved with the contract.
  • iPhone is trademarks of Apple Inc., registered in the U.S. and other countries.
  • The iPhone trademark is used under license from AiPhone Co., Ltd.
  • By phoneOpen 9:00 – 20:00

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      0120-959-472(Toll Free)

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