The Samsung smartphone marks the fourth Sprint device to receive the free calling capability.
Sprint's new service lets subscribers use Wi-Fi hot spots to make phone calls and send text messages. The move should help improve coverage for Sprint customers, especially indoors.
The Kirlian Device shines a light in different colours depending on Wi-Fi signal strength, allowing creator Luis Hernan to create paintings in light.
The carrier has confirmed that the Google Nexus 5 will not support voice over a Wi-Fi network.
The latest update to RIM's BlackBerry Messenger adds voice support, so people can call their contacts over a Wi-Fi connection.
A brace of BlackBerry news -- phones with BlackBerry 10 are due early next year, while BBM gets free calls over a Wi-Fi connection.
Though support documents posted this morning suggested the Nexus 4 could support Wi-Fi calling, T-Mobile has confirmed that the Android phone will not have the feature.
Blame Jelly Bean, but one of the carrier's most popular features will not be present for the "Pure Google" LG Android smartphone.
CNET editor Dong Ngo explains how Wi-Fi calling works with the latest smartphones, including the iPhone 6 and 6 Plus, and picks the top five routers that are best for this technology.
Here's how Apple's new feature to field iPhone calls on the Mac will work, and why you should care.