Yep, that's one of the main reasons people are excited for this. Instead of a dedicated ISP modem with 5G, you can just use this, plug it into a gateway WAN port set up as the secondary failover connection, and you'll have a backup if you get knocked offline.

https://help.ui.com/hc/en-us/articles/360052548713-WAN-Failo...

The 5G unit itself also has its own failover with support for two 5G SIMs.

"All are equipped with dual SIM slots, with one SIM replaceable by eSIM, and are fully unlocked: any major carrier, any type of deployment, with one piece of hardware."

You can also see the excitement in the subreddit where people are already in the Unifi ecosystem: https://www.reddit.com/r/Ubiquiti/comments/1pe5xh4/explore_p....