Got an iphone 4s unlocked. I hear about the prepaid plans but how does it work with the iphone? I know if you have those dumb phones, u could get 1000 anytime minutes a year for 100 dollars. But how is it for an iphone? Also i hear about this 100 minute a month plan with unlimited text and data but i also hear this has to be a walmart iphone or an iphone bought EXCLUSIVELY from walmart? Does this mean the unlocked 4s iphone i have, i cannot do this? I know the cheapest plan you can get for an iphone is if u went with virgin mobile as 300 minutes and unlimited text and data cost 35+tax a month but i had went with unlocked as i want the option to use it internationally.