LTE Plan

New applications are no longer accepted as of August 31, 2019

This is a rate plan for using 4G LTE Smartphones. Calls and SMS (C-mail) to au smartphones and au mobile phones are available at a reasonable charge.

Application Required


LTE Plan must be subscribed in combination with LTE Flat .(However, you can continue to use the rate plan only if you used LTE Plan before November 16, 2015.) A subscription to LTE NET (¥300/month) is required for Internet connection.

* The names of rate plans and data flat rate services for 4G LTE (au VoLTE) Android™ smartphones have "(V)".

Rate plan image Rate plan image

Basic Charge

Monthly basic charge When 2-year contract[1]is applied ¥934
Before various discount services are applied ¥1,868
Free call allowance -
Domestic calling charge To au mobile phones Free between 1:00 and 21:00
¥20/30 sec between 21:00 and 1:00
To other carriers' mobile phones or landline ¥20/30 sec all day
Packet communications charge A subscription in combination with LTE Flat is required.[2]
Domestic SMS (C-mail) To au mobile phones Free
To other carriers' mobile phones and PHS Sending: ¥3/time
Receiving: Free
  • * This rate plan is exclusively for 4G LTE.
  • * Free call allowance is not included in basic charges.
  • [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). Smile-heart Discount also apply.

  • [2]

    For Fx0 devices, LTE Flat cp (f・2GB) (Exclusive plan for Fx0 devices: ¥3,500/month) can be also selected.

    As of June 23, 2016, new applications for LTE Flat cp (1GB) are no longer be accepted.
    Customers using this plan did so under the condition of ¥2,680/month for up to 3 years; however, they can continue using the plan for ¥2,680/month until their next model change (purchase).

    LTE Flat cp(1GB)(in Japanese only)

Combined as a set with Flat-rate Data

  Data quantity Monthly charge
LTE Flat 7GB ¥5,700/month
Combined as a set with LTE Flat

au Wi-Fi SPOT is available by subscribing to LTE Flat. au also provides the home Wi-Fi router, "HOME SPOT CUBE2".
Click here for details

au Wi-Fi (in Japanese only)

Eligible models

LTE Plan LTE Plan(V)
4G LTE (excluding au VoLTE) smartphone 4G LTE (au VoLTE) smartphone
iPhone (excluding iPhone 4S) * This service is not available for 4G LTE(au VoLTE supported) mobile phones and 3G mobile phones.

Related service

This service offers free domestic calls to au mobile phones at a monthly flat rate of ¥477 for 24 hours!

au Flat Calling 24

Half-rate domestic calling all day no matter where you call!

Wide Calling 24

Data Charge

This service allows you to purchase data quantities in real time. If you purchase data quantities with Data Charge, no communications speed constraint is applied even if the total of the monthly data quantity you use exceeds 7GB.

Data Charge

Data Present

Give newly purchased data to friends and family. The person who receives the Data Present can increase the data amount they use by the amount given.

Data Present

Tethering Option

This option allows you to use your tablet or smartphone as a Wi-Fi router. Additional 500MB is added to the communications amount of 7GB that can be used without communications speed constraints.
(The additional data quantity of 500MB is not added during the free period of the option charge.)

Tethering Option

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


[Application of Discount]

  • 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 charge is prorated). If changing the contract or switching to the 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 is prorated while the Flat-rate Data service is not prorated and the flat rate is incurred.If you are subscribed to 2-year contract and cancel LTE Plan , basic charges are not prorated and the flat rate is incurred.

[Notes on free calls to au mobile phones]

  • For calls that straddle the 1:00 or 21:00 time designations, charges are waived for the time segment straddling a time designation (30 seconds). Calls to special numbers including the Answering Service (Voice Mail) (1417) are not counted as free calls.
  • 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.

[Flat-rate Data]

  • WiMAX 2+ packet communication charges are not eligible for the flat rate and maximum charges of LTE Flat

[Restrictions of communication speed]

  • 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]

  • You are notified that the amount of communications that you use exceeds 6GB or 7GB (additional 500MB when subscribed to the Tethering Option) with SMS (C-mail) the day after you exceed the amount.

[Communications charges for when using LTE Plan only]

  • If only LTE Plan is used, the domestic communications charge is ¥0.6/KB and the maximum domestic communications charge is ¥20,000/month.
  • * Applications for LTE Plan only are no longer accepted as of November 16, 2015.
  • 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
      about au mobile services

      157(Toll Free)from au phones

      0077-7-111(Toll Free)

      about Internet services
      Contract / Fee / Billing

      0077-7084(Toll Free)

      Connection setting / failure

      0077-777(Toll Free)