eero Internet Backup allows you to set up a nearby mobile hotspot or WIFI network as a backup when your wired internet goes down. Once enabled, eero Internet Backup will look for and connect to the available and compatible backup source you’ve set, keeping you online to focus on what matters most.
If your using your mobile phone as a hotspot, ensure you have enough mobile data. If you have a limited amount of data, the eero app allows you to pick certain devices which to use the internet backup feature.