Hotspot uses most of my internet while turned off
Why not having the personal hotspot turned on still consumes me over 90 GB of Internet
I use WiFi most of the time
iPhone 15 Pro, iOS 17
Question marked as
You have probably enabled Wi-Fi assist. See more below.
Wi-Fi Assist is on by default. If you don't want your iOS device to stay connected to the Internet when you have a poor Wi-Fi connection, you can disable Wi-Fi Assist. Go to Settings > Cellular or Settings > Mobile Data. Then scroll down and tap the slider for Wi-Fi Assist.
About Wi-Fi Assist - Apple Support