My new S5 is awesome, except when using wi-fi. When I connect it to my home's wi-fi, it drains so much data that no device can use the internet, including the phone. I called my internet provider (who also happens to be Verizon) and they said they watched the data stream jump 400% when I turned the wi-fi off on my phone. I witnessed it myself when trying to load a webpage at my computer that would not go through forever until I disconnected the phone from wi-fi and the page loaded immediately. So my question is, is there a way to discover what's using so much data or a setting that I can use to be sure this doesn't happen anymore? Could this be a problem with the device itself?