Wi-Fi Assist | Article about Wi-Fi Assist by The Free Dictionary
Wi-Fi AssistAn Apple iOS 9 feature for iPhones as well as iPads with cellular service. Wi-Fi Assist switches data transmission from Wi-Fi to cellular as the user moves out of a hotspot.
Wi-Fi Calling Is Cellular to Wi-Fi
Whereas Wi-Fi Assist switches from Wi-Fi to cellular when necessary, "Wi-Fi calling" uses Wi-Fi instead of cellular to make a voice call (see Wi-Fi calling).
References in periodicals archive
The situation is reminiscent of the Wi-Fi Assist
feature that Apple silently added and enabled in iOS 9.
3 update brought with it a number of substantial feature additions to the OS, including Night Shift display, privacy-protected Notes and data counter for Wi-Fi Assist
Apple iOS 9 users who want to turn off Wi-Fi Assist
can do so by opening the Settings app and tapping the Cellular tab.
Head to Mobile Data>>>Scroll right to the bottom to find Wi-Fi Assist
Users who are inadvertently using extra data due to this feature can simply head over to Settings > Cellular and then scroll down to turn off Wi-Fi Assist