Wifi assist
Through wifi assist, my cellular data gets turn off automatically if i connected with my wifi at home?
iPhone 8 Plus, iOS 12
No. If you have Wi-Fi assist turned on your phone will use cellular data any time Wi-Fi throughput is less than cellular would be.
While you didn't ask, your phone will turn off Wi-Fi when the screen locks unless the phone is connected to power, to save battery life. This has nothing to do with Wi-Fi Assist.
