During power cuts my home wifi internet doesn't work. The router works because it is connected to UPS, but I don't get internet from ISP. I want to have a system where I can just turn on my mobile hotspot, and the router automatically connects to it and uses it as a wan failover. And also potentially be able to do load balancing with my wired internet. How would I achieve such a setup? Or what search terms can I use to find such a setup?