Charlie Carcinogen
macrumors member
I’ve done that before, but then I run up my cellular data use because it stays connected to my iPhone.As long as your carrier plan supports ‘Personal Hotspot’ you just have to turn it on in Settings.
Settings>Personal Hotspot… then, Settings>WiFi>Auto-Join Hotspot.
Connect to the Personal Hotspot of an iPhone or iPad - Apple Support
Personal Hotspot uses the cellular data connection of an iPhone or iPad (Wi-Fi + Cellular) to create a temporary, portable Wi-Fi network that other devices can use to connect to the internet. It can be helpful when you’re not in range of a trusted Wi-Fi network.support.apple.com
It seemed like the way you described it would automatically connect to your hotspot only when you left the house. Maybe I misunderstood.