Subscribers realise they can avoid call charges by using internet telephony services on their mobiles at cheaper data rates, which is starting to hollow out the call revenues of mobile providers such as Denis O’Brien’s Digicel

Digicel is embroiled in a cross-Caribbean scrap with a phalanx of angry VoIP (internet telephony) providers, upon which Denis O’Brien’s company wants (...)

Viber Media chief executive Talmon Marco (right) speaks next to chairman and chief executive of e-commerce operator Rakuten Inc Hiroshi Mikitani during a news conference in Tokyo today. Photograph: Yuya Shino/Reuters

Japanese e-commerce giant Rakuten Inc has said it will buy call and messaging app provider Viber Media Ltd for $900 million (€657 million), aim(...)