If you are on a share everything plan then you can use the stock WiFi app without any charges. If like a lot of use you have keep your unlimited than you have to pay the monthly fee of $30 to use WiFi. But unlike before now when you pay the $30 you get to use your unlimited data! I had a MiFi when I had my GNex because the signal wasn't strong enough at my work to use the WiFi ( I also used STVP on my GNex) and was paying a whopping $80 a month for it! Since I got my G2 the signal is so much better I can use it for a WiFi at work, so I pay the $30 and canceled my MiFi and am saving $50 a month. So it doesn't bother me to pay. The main factor of course is you get to use your unlimited data! I'm on day 15 this month and have used a total of 12 GB of data so far.