D-Links DWR-921 4G LTE Router means that you can access & share your 4G LTE or 3G mobile broadband connections. Once connected, you can transfer data, stream media, & send SMS messages. Simply insert your SIM/USIM card & share your 4G LTE or 3G Internet connection through a secure wireless network or any of the four Ethernet ports. The DWR-921 4G LTE Router is designed with constant connection in mind. Dual-band 4G LTE & 3G support allows automatic 3G connection if or when the 4G LTE signal strength becomes low, whereas the additional x DSL/FTTH Ethernet WAN option gives fail-safe connectivity if either your fixed line or mobile broadband fails.