I'm sorry you're having issues. The $10 data add-on I believe you're referring to is required for all smart phones, if you're having issues though with 3G service in your area I would like to see if there's anything I could help you out with. I'm sending you a private message to gather more information.
Never had 3G service, doesnt seem it will ever come around here. I hate paying an additional fee to use the less than dial-up speed data for PREMIUM data service. I dont expect 4G right off, but we cant even get 3G being about 250 feet off a major interstate(I81). Other companies have 4G here already. I love my EVO, but if I cant even load the homepage without waiting 3 or 4 minutes, whats the point?