RingVantage is happy to announce the availability of PBX Fone, a mobile client that runs on Google Android and Apple iOS devices. It is currently available as a free download from the Google Play store and from Apple’s iTunes.What sets PBX Fone apart from other mobile clients such as the popular Bria softphone from Counterpath or the Zoiper softphone, is that PBX Fone extends the most popular PBX features directly to the mobile device.