I have a XE300C6. According to the datasheet, this device uses a Quectel EC25EFA which supports bands : B1/B3/B5/B7/B8/B20 B38/B40/B41MHz
According to this page : LTE frequency bands in Japan (Docomo, KDDI, SoftBank)
B1 : NTT Docomo / KDDI / Softbank
B3 : NTT Docomo / EMobile
B8 : SoftBank
B38 : SoftBank
Am i right ? If I take NTT Docomo, should it be enough to have a good coverage ?