I have a strange issue with my SP3 that I am having a hard time tracking down. I hit a meeting once a week where I turn on Wifi tethering on my phone. I use a local copy of Outlook and have that open and may do some very light browsing to look something up. Otherwise I am fairly idle. Problem is during that hour my tethering eats up 500mb in data. My SP3 is synchronized before I ever walk into the meeting, I am the only person connected to the phone for tethering. What it almost seems like is when my SP3 sees that Tether network, something must kick in to start syncing that doesn't sync over normal wifi. Doesn't make any sense to me. I don't see anything out of the ordinary happening but something must be running somewhere. Either that, or the data usage on the phone is reporting bad data maybe. Phone is a Galaxy S5. Anyone ever seen something like this before?