Zer01 Mobile says it has severed its business relationship with Buzzirk Mobile for distribution services, based upon breach of contract. It isn't immediately clear what impact the termination will have, as Zer01 is a mobile virtual network enabler and can supply its unusual and interesting approach to mobile voice to other distributors, but Buzzirk seems to have been the most-active of the MVNO marketing partners.
What remains interesting is the approach Zer01 has taken to creating its "VoIP over mobile" capabilities. Essentially, the company uses what it says are national interconnect agreements with GSM providers, and VoIP from VoX to create its service, instead of the traditional MVNO route whereby customers buy wholesale capacity from networks, repackage and resell those capabilities.
Zer01's approach has been to establish itself as a "carrier" for purposes of interconnection, which allows it to exchange traffic with other carriers using the industry-standard rules without buying capacity on one or more networks to resell.
It remains an intriguing approach, though the effort has been clouded by some controversy, which Zer01 now appears to want to put behind it. Zer01's corporate parent is privately held, and has no obligation for the fuller reporting a public company must provide, but a bit more transparency would not hurt, one might argue.