Purchase an eligible model and get a discount on usage fees
If you apply for a specified packet communication flat-rate service and simultaneously subscribe to a Simple Course when you purchase a model for a new contract or model change (additional phone), you can get 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.
|Flat rate||Not required||Application||Not required|
Please ask about compatible models at the store.
Sample of monthly payment when Monthly Discount is applied
When receiving a monthly discount of ¥2,000 over 24 months for purchasing a mobile phone on a 24-month installment plan 
-  Amount of discount depends on the model purchased and the timing of purchase. A 36-month discount is available for some models.
Eligible models/Amount of discount
Please check at your local au shop for details about eligible models and the amount of discount.
-  Plan F (IS) Simple is also eligible. The amount of the discount varies depending on whether or not you are subscribed to au Smart Pass.
-  Double-Teigaku-Super Light, Double-Teigaku-Light, Double-Teigaku, Packet Discount WIN Middle, Packet Discount WIN Super, IS Flat, and Plan F (IS) Simple are also eligible.
-  The router discount and fixed-line-substitute discount at the application of Smart Value are not eligible for the discount.
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 monthly basic charges (excluding LTE Plan), domestic calling charges, domestic communication charges, and option charges (excluding the monthly basic charges of 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. The discount amount is calculated using the tax-excluded charges on a billing statement.
- * 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 and then the normal rate will be applied.
- * Even if the application of the specified packet communication flat-rate service (inducing some rate plans) you subscribed to will not start until the following month, the discount period begins from the month preceding the start of the service.
- * If you changed your model (added a phone), temporarily suspended the use of our service, canceled our service, or canceled or changed a designated flat-rate packet communication service (including certain rate plans) to a non-designated service during the discount application period, the discount is deemed to terminate with the use in the month before the application for a change (the month when the application of the plan was terminated) was made.
- * This service may not be available in combination with certain KDDI deals.
- * If you have made your purchase in Okinawa, this service is not applicable.
- * 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.
- * The amounts given are tax-included except for when otherwise noted.