iPhone Plan Question





Already posted this at another forum with no luck, so I’ll try here :) .   If I currently am on a standard Family Plan, FamilyTalk 700 I believe, and have the $30/month unlimited text for everybody and $30/month unlimited data for my Samsung Blackjack II, would there be a price increase if I purchased an iPhone 3GS? If I would end up paying more per month, how much would it be?   Thanks! Considering picking one up tomorrow.