If I jailbreak my IPhone 3G will i have to reactive the phone plan?

I wanted to jailbreak my iPhone because the Internet is not working. Everyone tells me to change the APN settings on it but my phone doesn't have it it has VPN settings. So the customer service told me I hadn't jailbroken it and I needed too. But I wanted to know if I jailbreak it, will I have to activate it again? I have my phone activated with NET10, the 50.00 plan and well I don't want to pay again, an activation and set up of it all. And also what are good, free and easy jailbreak websites/apps/methods?

You shouldn't have to reactivate it… But i couldn't tell you that for sure. What i can tell you is that for a jailbreak on the last supported firmware for the iphone 3G is Sn0wbreeze.