New applications are no longer accepted as of August 31, 2019
Unlimited free domestic calls (up to five minutes) 24 hours a day★!
In addition, domestic calls made between family members that exceed 5 minutes are also free! (When 2-year contract + Family Discount are applied)
Unlimited Calling Plan S(Smart phone) must be subscribed in combination with Flat-rate Data 1/3/5/8/10/13/20/30. (The Unlimited Calling Plan S(Smart phone) service cannot be used in combination with LTE Flat.) 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)".
|Monthly basic charge||When 2-year contract  is applied||¥1,700|
|Before application for various discount services||¥3,200|
|Domestic calling charge||To au mobile phones||Calls up to 5 minutes: Free
Calls that exceed 5 minutes: ¥20/30 seconds
Calls made between family members that exceed 5 minutes are also free
|To other carriers' mobile phones or landline|
|Data communications charge||Select from Flat-rate Data
|Domestic SMS (C-mail)||To au mobile phones||Sending: ¥3/time Free for family members 
|To other carriers' mobile phones and PHS|
★This is not applicable to some calls.
|Data quantity||Monthly charge||Monthly total ||Availability of Data Carryover |
|Flat-rate Data||Flat-rate Data 1(1GB) ||¥2,900||¥4,900～||-|
|Flat-rate Data 3(3GB)||¥4,200||¥6,200～||-|
|Flat-rate Data 5(5GB)||¥5,000||¥7,000～||○|
|Flat-rate Data 8(8GB)||¥6,700||¥8,700～||○|
|Flat-rate Data 10(10GB)||¥8,000||¥10,000～||○|
|Flat-rate Data 13(13GB)||¥9,800||¥11,800～||○|
|Flat-rate Data 20(20GB)||¥6,000||¥8,000～||○|
|Flat-rate Data 30(30GB)||¥8,000||¥10,000～||○|
Even greater savings when combined with au Smart Value! Click here for details
|Unlimited Calling Plan S||Unlimited Calling Plan S (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.|
|AQUOS K SHF31|
|* This service is not available for 3G mobile phones.|
You can purchase as much data quantity as you need (in 0.5GB or 1GB units) in real time when you need it. You do not need to worry even if you use a lot of data.
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.
The Data Gift service allows family members to give the monthly data quantities (in 0.5GB units) to each other in real time at no additional charge, ensuring that extra data quantities are used without going to waste.
Long-term au customers will receive an extra data amount once every 3 months according to the au contract period (5 years and over) and subscribed Flat-rate Data service.
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.
[Unlimited Calling Plan S(Smart phone)]
[Application of Charges]
[Restrictions of communication speed]
[Communication amount notification]
<When using Flat-rate Data>
<When using Data Charge>