You better Disable Wi-Fi Assist in iOS 9 that you just downloaded for your iPhone or you're going to have a BIG data overage bill

We were less than 2 weeks into our monthly cycle with Verizon when I got a text saying we had used 75% of our data on our cell phone plan. I new something was wrong, but moments after that a client called and the thought was gone out of my mind.  Then a week before our bill cycle was up I got another notice letting...