It may have been delayed by a few days, but MVNO Voyager Mobile has opened its doors for business today after its original launch plans were thwarted by a "malicious network attack" on May 15th. As a refresher, the service provider repackages and sells Sprint's CDMA (3G) and WiMAX network as part of a $39 per month, contract-free unlimited talk, text, and data plan. If you have no need for data, the $19 per month unlimited plan should suit your needs. Voyager is shaking things up a bit with a rewards program that earns you points based on how many talking minutes you use per month. The carrier's website says that the rewards feature is coming soon, as well as plans for MiFis and tablets that will also be unlimited. For now, there's a fairly standard selection of smartphones and dumbphones to choose from, headlined by the Samsung Galaxy S II Epic 4G Touch, which will cost you $549 (no contracts mean no subsidies, of course). For now you'll need to be in one of the 22 states that the service is launching in if you're interested in signing up.