Seems like you don't quite understand the different connections. You can connect via wifi or via your cellphone service provider in 3 different speeds: 2G (GPRS, roughly equal to dialup speed) 2.5G (EDGE, faster) or 3G (much faster than EDGE, but harder on battery life). If you're still confused, Google is your friend. If you want to use wifi only go to Settings > Internet connections > Connect automatically and choose 'Wi-Fi'. Then I think it will only connect using wifi.