Mobile Hotspot
Feature on all modern iPhones and Android devices that allows your phone to use 4G LTE or 5G and transmit a WiFi signal that 5 - 20 devices can connect to. Usually has a limit of 5 - 50 GB per month depending on carrier and data plan.
I'm setting up the Mobile Hotspot so we can use the WiFi without the router because we are moving and the WiFi router is at the other house.