Sprint announced this morning Samsung Galaxy S 4 with Sprint Spark becomes the first device to get the over-the-air software update enabling the ability to use Wi-Fi Calling when traveling abroad. This new feature allows those traveling abroad with Wi-Fi Calling enabled phones to make and receive calls to friends and family in the United States, U.S. Virgin Islands and Puerto Rico at no additional charge while connected to a Wi-Fi network. Here's more info:
International Wi-Fi Calling gives you access to voice and messaging services over existing home, office and public Wi-Fi networks in more than 100 countries outside the United States back to phone numbers in the United States, U.S. Virgin Islands, Puerto Rico without being charged or using monthly plan minutes.
Galaxy S 4 with Sprint Spark will be our first smartphone to get the International Wi-Fi Calling update. We plan to expand Wi-Fi Calling with international calling capabilities to additional devices throughout 2014.
Currently, Wi-Fi Calling is available on 11 smartphones from Sprint: HTC One max, HTC One (M8), HTC One (M8) Harman/Kardon edition, LG G3, LG G Flex, Samsung Galaxy S 4 with Sprint Spark, Samsung Galaxy S4 mini, Samsung Galaxy S5, Samsung Galaxy S5 Sport, Samsung Galaxy Mega, Samsung Galaxy Note 3 and SHARP AQUOS Crystal (coming soon).