Ahead of the official iPhone launch on its network later this year, the nation's fourth-largest carrier T-Mobile USA on Tuesday said a new GoSmart prepaid service is now available via some 3,000 reseller stores nationwide. According to Reuters, users can purchase a SIM kit and simply bring their own GSM device to the service. Unlimited voice and messaging costs $30 a month.
For an additional five bucks, you get to browse the web. A $45 plan with five gigabytes of 3G data is also available. These are all month-to-month plans, meaning you can cancel the service anytime without getting penalized...