I used my phone as a wifi hotspot to connect the Nexus to the internet whilst on the go. I was probably surfing for about half an hour or so and in that short time I racked up about 200 Mb!!! How is this possible? I wasn't even streaming music or watching videos, just surfed a few websites like ebay etc. and a bit of Facebook... I was hoping to do this regularly as the nexus is wifi only obviously, but if it uses this much data my data plan on the phone will not last very long! Any ideas?