At the recent Broadband World Forum Asia 2013 conference, Korea Telecom’s EVP Tae-Yol Yoo predicted the collapse of voice and SMS services revenues in Korea: KT’s PSTN revenue has dropped from $5.4 billion in 2008 to $2.7 billion in 2012; Its mobile voice revenue fell from $6.2 billion in 2010 to $5.2 billion last year […]