ok, i have to say i am on page plus too, and 50 mb data is not enough, even with wifi connection at home & work, but u cant really beat the price. and I also noticed the occasional data usage even when I'm connected to WiFi. It annoyed me so much that I keep playing around with the phone and found the solution. It is bcos ur wifi turned off when ur screen goes to sleep, what you can do is go to settings, wireless & networks, wifi setting, and hit the menu button, and choose advanced. you can select 'always keep my wifi on'. Now, no more occasional data usage, but it does use more battery power. anyway, hope it helps!