Beware: New iOS defaults can run up data bill
Posted September 28, 2015
The new iPhone operating system, iOS 9, includes a feature designed to help users get a better connection, but it is one that can run up the bill for those without an unlimited data plan.
The feature called "Wi-Fi Assist," is turned on by default. Where Wi-Fi is spotty or not available, it automatically switches a phone to use mobile data.
The easy fix is to turn off "Wi-Fi Assist" and only access it when you really need it.
To do so, open the phone's Settings app, select Cellular, then slide the Wi-Fi Assist to Off.