After adding Wi-Fi Calling to the Samsung Galaxy Note 3, Sprint today announced another Samsung device gets Wi-Fi calling capability. The Samsung Galaxy S4 with Sprint Spark (enhanced LTE) becomes a fourth Wi-Fi Calling enabled smartphone from Sprint through an over-the-air update that started rolling out today. The update notification will be pushed to all our customers automatically during the next few weeks. Here's more info on Sprint's Wi-Fi Calling service:
Wi-Fi Calling is a FREE service that lets you use voice and messaging services over existing home, office and public Wi-Fi networks. With Wi-Fi Calling, you will experience improved voice, data and messaging services in locations that previously had limited or no mobile network coverage.
-Enhanced coverage for in-building coverage or areas with challenging network conditions -Easy setup: Once activated, everything is seamless and happens in the background -Unlimited voice calling and messaging on Wi-Fi: All domestic calling and messaging is FREE (standard CDMA international rates apply for international calls) -Once the download is complete, you will be prompted to install the update. Installation will take a few minutes during which the device will be disabled. Once installation is completed, the device will be ready for use and Wi-Fi Calling can be activated by going to your Apps folder and selecting the Wi-Fi Calling icon.