Too high cost of calls

In this Autumn, I will visit Michigan again.
So, I want to use cell-phone on site.
I check many cell-phones on the internet but they are very expensive.
In addition, we can use only W-CDMA system, but most of the countries use GSM system.
So, I have to buy the machine accepting both of them.

The Smartphone from e-mobile

I have checked a smartphone that has been released by e-mobile.

It has many useful functions but we can use in very limited area .

So, I hesitate to buy it .