"B-mobile WiFi" is a SIM-free product that appeared in an era when mobile Wi-Fi routers were rarely sold individually and line contracts were commonplace.
The mobile Wi-Fi router, which is reasonably priced at ¥ 19,800, was released today in 2010.
As you can see from the fact that it bears the name of b-mobile, it was released by Nippon Communication. However, it was noted that the SIM provided by the company for MVNO is not required for both use and purchase, and it is SIM-free that can be used with SIM of other carriers.
However, at that time it was still before LTE appeared, and the corresponding frequency bands are SUPA / HSDPA / WCDMA 800 / 2100MHz, GSM / GPRS / EDGE 850/900/1800 / 1900MHz, so docomo, Or you can choose SoftBank.
What was perfect was to use it with the "b-mobile SIM U300" provided by the company with the 300kbps limit. Although the speed is slow, it can be used as much as 2980 yen a month, so it was attractive to be able to connect multiple devices to the Internet without worrying about communication charges and communication time.
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