If you subscribe to a specified data (packet) flat-rate service and simultaneously subscribe to a Simple Course when you purchase a model with a new contract or model change (additional phone), you can get a discount for up to 24 months (from the month following your purchase) on your charged fees! 
Please check on the following link for Monthly Discount for iPhone or iPad.
|Flat rate||Not required||Application||Not required|
Image of Monthly Discount (for the maximum 24-month period)
If you purchase an eligible model in 24 installments, the discount amount that is specified for your particular model is deducted from the basic usage charge every month for up to 24 months. 
- The discount amount depends on the model purchased, the timing of the purchase, and whether or not you have an au Smart Pass subscription (¥372/month). A 36-month discount is available for some models. A 36-month discount is only available for BASIO and miraie.
Eligible models/Amount of discount
Please check at your local au shop for details about eligible models and the amount of discount.
|Model||Specified data (packet) flat-rate service or rate plan|
|4G LTE smartphone||
|4G LTE featurephone||
|4G LTE tablet||
(Applications are no longer accepted as of December 21, 2015)
(Applications are no longer accepted as of September 1, 2015)
|data communication device||ubscription to a Simple Course |
- * The names of rate plans and data flat rate services for 4G LTE (au VoLTE) Android™ smartphones have "(V)".
-  As of September 14, 2016, new applications for Flat-rate Data 8/10/13 are no longer accepted. This includes plans with (V) and (Mobile phone).
-  A rate plan for AQUOS K SHF31.
-  For mamorino3 and mamorino2 (including X models), this applies if subscribed to EZweb, not the conditions above.
-  Two-step data flat Super Light、IS Flat 、Two-step data flat Light (Applications are no longer accepted as of September 1, 2015), Two-step data flat (Applications are no longer accepted as of September 1, 2015, Packet Discount WIN Middle (Applications are no longer accepted as of September 1, 2015), Packet Discount WIN Super (Applications are no longer accepted as of September 1, 2015), Plan F(IS) Simple (Applications are no longer accepted as of September 1, 2015) are also eligible.
-  A 36-month discount is only available. Tablet Plan ds (2-year contract)/(2-year contract/L) is not eligible for Monthly Discount.
-  A 24-month discount is applied to iPad. A 36-month discount is applied to Android tablets.
-  The discount is not applied if au Smart Value (router discount) or au Smart Value (outside of the service area) is applied to a Wi-Fi router.
Applicable discount period
The month following the month of your purchase is counted as the first month, and the discount is applied for up to 24 months  .
-  The discount automatically begins from the month following the month in which an application for a new contract or model change (additional phone) is made. The discount will be terminated after it is applied 24 times (36 times for some models) and then the normal rate will be applied.
- * The discount applies to the total amount of the monthly basic charges (excluding LTE plans), domestic calling charges, domestic communication charges, and option charges (excluding Keitai Guarantee Service Plus LTE, Keitai Guarantee Service Plus, and Keitai Guarantee Service) after all other discounts are applied. If the total amount eligible for this discount falls below the amount of the discount, the total amount eligible for the discount shall be set as the upper limit of the discount.
- * If you change models (add a phone), temporarily suspend the use of the service, cancel the service, or cancel or change from a designated data (packet) flat-rate service (including certain rate plans) to a non-designated service during the discount application period, the discount is deemed to terminate at the end of the month preceding the month in which an application for the change is made (the month when the plan is terminated).
- * This service may not be available in combination with certain KDDI deals.
- * Monthly Discount is an ongoing discount service, but the conditions for receiving the discount and the amount of the discount may be subject to change and may vary according to the timing of the purchase. Prior notice will be given if any change is to be applied.
- * Please check at your local au shop for the costs involved with the contract.