I live in an area that doesn't have 3g and I want to get a used 2g/original iPhone for my wife (we're on a family plan together and I have an iPhone, but she doesn't...yet). Can I still activate it via iTunes by adding the $20/month data plan or has the upgraded, more expensive data rate taken effect? I'd rather go with the older phone and rates and save the $200-300 over the two years of the contract. I'm stalking a few of the original iPhones locally on Craigslist...