"IPhone 3G fee maker" for SoftBank mobile users

When SOFTBANK MOBILE users change models to iPhone 3G, complicated calculations are necessary, but it seems that it will calculate it with a single shot.

So, I tried what happens actually.

Details are as below.
Apple iPhone 3G price maker
http://rozes.jp/shopping/

When you access the above page, this kind of screen appears and let's enter necessary information

Since there is no "Y!" Button on this model, do "setting / application" from here

Press "Check Usage"

Push "online charge guide"

Enter PIN

Let's type

next

I got to the price guidance

With this, "Inquiry Contract Contents Inquiry" becomes possible

I did not install the installment contract

Next time I will look at "Special Discount Contract Contents Inquiry", but again no

As a result, it became almost like this, the calculation start by clicking the bottom button!

The result is like this. 8740 yen monthly with 8GB version, 9220 yen monthly in 16GB version ...... Feels like quite high ... ... Is this something like this?