where Wi-Fi Calling is prohibited by law, including North Korea, Iran, and Syria. First, you need a smartphone with a good internet connection.
Japan's Rakuten will acquire instant messaging and calling app developer Viber Media for US$900 million, the e-commerce giant said Friday, highlighting its moves to penetrate new markets. Call and text on Wi-Fi networks using your T-Mobile phone number.
Viber has updated its apps for Android and iOS to let users make video calls.