Use a USB cellular modem with a CradlePoint ARC CBA that you . I've been happy with this TP-link 4g router using a verizon USB device. Buy CradlePoint CBA 3G/4G Mobile Broadband Adapter at Amazon UK. I used this to bridge (pass through) an aircard to the second WAN port on our router. Now, when our Comcast Internet service fails, the Verizon 4G LTE modem. CradlePoint engineers and manufactures docking cradles, cellular routers, and software platforms that and is the only 4G LTE networking platform to offer dual-modem multi-carrier support and Unified CradlePoint CBA - Discontinued.