Practical application of the world's first IP mobile phone, unlimited calling at a fixed price

According to the Nihon Keizai Shimbun news report, you can telephone using the Internet line "IP phoneIt is said that the flat-rate call service using mobile phone technology for the first time in the world will be started.

The start is scheduled for July to September this year.

Details are as below.
Japan communication, IP mobile phone commercialized · World first, in the period of July to September

According to this article, Nippon Telecommunications is scheduled to start the IP telephone service using mobile phone network in the July - September quarter of 2008 by borrowing the network of NTT Docomo.

Calls between IP mobile phones are scheduled to be fixed, and if the companies are introduced all at once, the cost of calls will drop sharply. There is no example of introducing an IP phone using a cellular phone network, and it is said to be the first time in the world to realize it.

By the way, when saying "call fixed amount with IP mobile phone", I was told that just by connecting the adapter "MobdeM" to the mobile phone the call will be flatBankruptcy of Japan Media NetworkI think that it will be a proper service because it actually rents NTT DoCoMo network and so on.