In the past seven months, Verizon Wireless (NYSE: VZ) said its customers have placed more than 1 billion VoLTE calls, talking for more than 3 billion minutes.

Verizon also said that it now counts 16 smartphones that are VoLTE-capable, including the new Galaxy S6 and One M9. The service offers HD Voice connections between customers with VoLTE-enabled Verizon smartphones. Video calling is available on all capable Android phones and simultaneous voice and data is available on Android smartphones and on the iPhone 6 and 6 Plus.

Verizon launched its Voice over LTE (VoLTE) service in September, 2014, calling it "Advanced Calling." The carrier did not say how many VoLTE customers it has or what percentage of its device base is VoLTE-capable. However, Verizon spokeswoman Debi Lewis said that the carrier has "tens of millions" of VoLTE-capable devices on its network. "We haven't broken out customer numbers, but you can see by a billion calls, that's a lot of use," she told FierceWireless.