Hey guys I'm planning on buying an iPhone 3g or 3GS and I have a few questions: 1. If I'm on wifi and want to go onto safari, cydia or any app that requires and Internet connection, will it use the wifi or the cell signal for access? Or both? 2. Is the apps in cydia which allow you to use VOIP apps over 3g, what if you don't have 3g? Will it just work off the regular cell signal. 3. I use textplus, can I use that over a cell signal or is it just wifi? 4. Is there a GPS app that will allow me to use GPS without costing me anything. 5. When do new models of iPhones usually come out? 6. What are the differences between the 3g and 3GS? I know these seem like noobish questions but Ive never had an iPhone before. Thanks for the help.