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|
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. 
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 month following the month of your purchase is counted as the first month, and the discount is applied for up to 24 months  .