The D-Link DWR-921 4G LTE Router allows you to access and share your 4G LTE or 3G mobile broadband connections. Once connected, you can transfer data, stream media and send SMS messages. You can simply insert your SIM/USIM card and share your 4G LTE or 3G Internet connection through a secure wireless network or any of the four Ethernet ports. Dual-band 4G LTE and 3G supports allow automatic 3G connection, if the 4G LTE signal strength becomes low. The additional xDSL/FTTH Ethernet WAN option gives fail-safe connectivity, if either your fixed line or mobile broadband fails.