Ring Back Tone (통화연곰읜) Online

South Korea pioneered this market, with SK Telecom (SKT) launching the world’s first RBT service, "Coloring," in March 2002 . Within 10 months, it achieved a 35% subscriber penetration rate. Korean Carrier Variants: SK Telecom: Coloring (컬러링). KT: Tooring (투링). LG Uplus: Feeling (필링). 2. Service Evolution: From Audio to Video (V Coloring)

As of 2021, the service offered approximately 4,000 types of videos , including K-pop idol content and user-created videos. Ring Back Tone (통화연결음)

V Coloring is increasingly being positioned as a mobile advertising platform for businesses. South Korea pioneered this market, with SK Telecom