There's been a degree of irony to MetroPCS' support for for Rich Communication Services when it's been limited to the one carrier's network in the US -- where's that universal chat and sharing we were promised? The carrier plans to live up to those lofty expectations with word that its Jibe Mobile-developed Joyn service will talk to devices on any North American carrier that supports the spec. That currently doesn't equate to ubiquitous access when RCS isn't widespread, but it's a start. We'll just have to w
