Yikes! This New iPhone Feature Could Make Your Bill Super High

Update: Looks like the feature has caused Apple even more drama. The company is now facing a class-action lawsuit in California, which asks Apple to reimburse customers who ended up with large bills due to "WiFi Assist" being turned on automatically. According to Apple Insider, the lawsuit accuses Apple of "violating California's Unfair Competition Law, the state's False Advertising Law, and of negligent misrepresentation."

Original story: There are plenty of features to love about iOS 9, like a battery-saving mode and a cool new way to use Siri. However, one detail about iOS 9 is freaking out customers because it uses their data without asking.

The feature, called WiFi Assist, is turned on automatically and switches over to a cellular network if your current WiFi connection isn't working that well. While definitely a good idea in theory, it could easily eat up a data plan, especially if you don't even realize this is turned on and don't have unlimited data.

Thankfully, it's pretty easy to switch off. Just head to Settings, tap on Cellular, scroll down to the bottom, and turn it off. Now you should be set and your data plan saved. Apple also has its own help page dedicated to this new tool.

And in case you forgot, you can always check your data usage either on your carrier plan's website or on your iPhone. Thanks Apple, but next time, think about how certain features might affect people before just switching something on for everyone.