How do i convince my dad to let me get an iphone 3g and pay the $90 a month for it all by myself?

lol Sounds like you really want the iPhone. Sorry to tell you, but your dad is right : / U'l be spending 90% of your income just to pay off the peice of plastic phone, not cool. I bought the iPhone soon as it came out here in Aus, spent allot of money, had great fun playing with it for first few weeks, now I regret buying it soo badly. It's just a mobile phone, all other features are crap gimicks. Save your money or buy (if u dont already have one) a Laptop PC which is a useful tool. An iPhone is a toy, dont waist your money!! :D Dont be sucked in by the multi-million dollar advertising campains. lol Trust me, U will regret buying the phone after a very short while bro.