There's a new setting in iOS 9 that might be racking up your data bill. Here's how to disable it. Readers like you help support MUO. When you make a purchase using links on our site, we may earn an affiliate commission. Read More. The release of the iPhone 6s, iPhone 6s Plus, and the iPad Pro featured the newest iteration of iOS, and data shows that over 50-percent of Apple device owners flocked t