Docomo支援的4G LTE頻段主要有4個:
a. 800MHz(Band 19)
b. 1500MHz(Band 21)
c. 1800MHz(Band 3,只限東名阪地區)
d. 2100MHz(Band 1)
※1800MHz(band 3)只限東名阪地區可使用,若日本其他地區使用4G就要看是否支援2100MHz (Band1)。
It works but not very good compared to my rental wifi egg pickup at Tokyo Airport. Maybe it's because of the sim card issue. (Bought from Taobao and is using Softbank.) Most of the time it shows full signal strength and connected to 4G but the connection was slow and sometimes no internet connection at all.
From my many experiences using sim in Japan (From North to South), renting a Wifi Egg in Japan is much much better.