Hi, I have the limited 150mb plan because that's all I can afford at this moment. Last month I went over that limit and had to pay an extra $15 because of it. My cycle ended on the 21st and as of today, the 31st I have already used 132mb. I have switch pro but that only disables the 3g while the screen is on. But when I turn the screen off 3g will go back on again. I could go into settings and force wifi to stay on when the screen is off rather than switch over to 3g but that kills alot of batteries. So is there an app that anyone knows of that will disable 3g even when the screen is off?