Tags: Website.
Brring was a free service allowing users to create phone numbers with embedded preroll advertising. Brring allows users to create custom ringback tones or sounds played before the phone is answered. Brring originally paid users to refer users to their service but discontinued that feature in July 2008.Brring pioneered voice-based in-call advertising by working around network operators and re-routing calls though an open-source IP-based ringback and call routing system.