In the past seven months, Verizon Wireless said its customers have placed more than 1 billion VoLTE calls, talking for more than 3 billion minutes.
Voice over LTE (VoLTE) and LTE Advanced (LTE-A) are among the hottest mobile network trends right now for operators, and deployments are rising across the globe.
EE has launched Wi-Fi calling services designed to enable users to make calls and send texts via their home or office Wi-Fi networks where mobile coverage is poor.
AT&T Mobility said it will need to wait until it deploys Voice over LTE nationwide to support CDMA voice roaming on its 700 MHz spectrum.
U.S. Cellular plans to cover essentially its entire customer base with LTE by the end of the year, hoping that expanded access to faster mobile broadband speeds will help its subscriber numbers and churn.
Vodafone Germany is demonstrating voice-over-LTE (VoLTE) services on a live network at the CeBIT conference and exhibition in Hanover, Germany this week and said the all-IP technology is now being rolled out across its 4G network, which now covers 70 per cent of the country.
T-Mobile US is seeing strong adoption of its Wi-Fi calling feature, according to a T-Mobile executive who said the operator now counts 7 million users of Wi-Fi calling.
Vodafone UK plans to offer commercial voice services over Wi-Fi and LTE networks from this summer, as the operator vies with rivals to be first to market with services designed to improve the availability and quality of voice calls over mobile data networks.
For the past decade, the industry has been laser-focused on mobile data and how network operators are going to address users' escalating demands for data. Voice services, for the most part, took a back seat to data during this time. But that's no longer true. Voice over LTE, Wi-Fi calling and HD Voice are now becoming must-have services for operators.
U.S. Cellular will begin testing Voice over LTE service with users in a handful of markets this year. Speaking at the Citi 2015 Internet, Media and Telecommunications Conference on Tuesday, CEO Ken Meyers said that in 2015 the company will focus on finishing its LTE rollout and will begin a VoLTE user trial in "two or three" markets.