Helio lets you talk to friends for free
Helio, the cell phone provider that brought us the first MySpace phone, now offers unlimited mobile-to-mobile calling for all of it’s "All In" members. The catch is that you pay for all of the services in their "All In" package, then M2M calls are now free. If you pick and choose your features a la carte, then the additional feature runs an extra $5/month. Finding someone that also has a Helio phone to take advantage of this feature might be a problem with only an estimated 100,000 subscribers, but hey there’s always the oh-so-creepy feature Buddy Beacon to track where nearby Helio users are.
I’m honestly surprised that Sprint customers are not included a la Boost/Sprint or AMP’d/VZW.