BMobile LTE SIM specs:
http://www.bmobile.ne.jp/l_1gb/detail.html
LTE:2100MHz/1500MHz/800MHz
W-CDMA/HSDPA/HSUPA:2100MHz/800MHz
However eConnect website says their SIM card has : Downlink: 7.2 Mbps / Uplink: 5.7 Mbps (best effort)
which are the specs for HSDPA (3G), not LTE.