I was on Facetime on my phone last night, while in my home and connected to wifi. I was still charged for data usage and now I'm over my monthly limit. I am absolutely certain that I was connected to wifi the whole time. Also I've been noticed data charges occuring overnight while I'm sleeping at home and once again connected to wifi. I had 300mb of data a month on my plan at my previous cell phone company, and never had trouble staying under that limit. Since I've switched to Koodo I've went over my 300mb data limit almost every month without changing my phone habits. What's happening?