Apple ipod

Data Plan iPhone 2G and 3G jailbreak and unlock?

I think I just bought the iPhone 2G can be some time after the 3G comes out. I'll buy off eBay. So my question is, I can go to AT & T and get the plan of 20 million records? Or I have to pay $ 30 since, as they have new data plans iPhone 3G? Also, if you just bought off eBay, does not work for calls and other things since I have no contract with her again? Or not true, and when you has a phone without a plan, you have everything unlimited? My last question is that I can jailbreak or unlock the iPhone without the problem right? Or is it really hard and does depend on the version of your iPhone? Jailbreak I finally have a GPS navigation system and other applications.

when the 3G model was released, iphones 2G is marketed by Apple and if you bought an iPhone from the end of May, you may be able to change their model 2G 3G model. If you buy the 3G model, it is best to get that the unlimited data plan, which is $ 30 per month and the best thing is to make this plan or you will pay much more if you are not the only way to acquiring the model is Apple or AT & T. and before leaving the store is required to establish a contract for two years. or suffer 'undefined' consequences. However, if no longer unlock the phone until the end of his one-year contract [-2, but there is probably a newer version at this time], but there are rumors that AT & T and Apple the iPhone will again if the contract is canceled or when the contract ends. The 3G model has GPS

Iphone 3G Unlocked on T-Mobile = $50 unlock