RED box and dual-sim routers?

Question

Hi there, we use RED boxes on some of our smaller unmanned offsite locations with verizon LTE wireless modems for connectivity. We have been VERY disappointed with the reliability of the connection. Up, down. Up down. Constant notifications that the RED box is down, followed by another one two minutes later that it is back up. 
 On top of this annoyance, a few months ago verizon had a major outage in our area, and none of our engineers could connect to these locations for 24 hours, which was very frustrating. We were hoping to solve both these problems with a cradlepoint dual-sim router, like this . Theoretically, when the verizon connection goes out, the router will failover another carrier. 
 Would RED box work with this device? My understanding is that the WAN IP would be changing when it fails over, would this cause problems? 
 Thanks

BAlfson · Answer

Hi, Daniel, and welcome to the UTM Community! 
 Keep in mind that the RED is a client that "calls" the UTM, so the UTM doesn't care where it's calling from, the UTM will recognize it. 
 You might consider replacing those REDs with SG 105/115s with Network Protection. A 115 gets better throughput than the RED and both the 105 and 115 can do IPsec tunnels. Of course, I'm assuming the Verizon and other LTE modems will work with the SGs. If this works, you also can do Uplink Balancing and take advantage of combined bandwidth instead of using one at a time with the expensive Cradle Point. 
 A 115 with Net is less expensive than a RED 50. If you want to sell those REDs on eBay, remember to record the Unlock code - without it, a RED is worthless! 
 Cheers - Bob