DL 100Mbps, UL 50Mbps Support LTE,DC-HSPA+,HSPA+,WCDMA(UMTS) 4G LTE-FDD 2600MHz,3G UMTS ... FDD 4G LTE frequency 2600MHz and compatible with the 3G DC-HSPA+/UMTS networks, auto switch between 4G/3G/2G, up ... .76Mbps speeds under 3G mode. ZTE AL621 4G LTE-FDD/DC-HSPA+,zte wireless usb modems