Thanks for being with Samsung and for sharing your concern. We would like to inform you that Wi-Fi calling allows you to use a Wi-Fi network to make and receive phone calls, rather than using the traditional mobile network. This benefits those in poor signal areas, such as rural villages and underground stations, as you'll be able to harness the power of available Wi-Fi networks to stay connected. Drop down notification panel>enable>Wi-Fi calling.
Be sure to hit ♡ when you find an answer that works for you. For Further assistance, you can get in touch with us via Live Chat option by following- http://livechat.support.samsung.com/Customer_new/IN. You can also connect us via Samsung Members web community by following mentioned url-https://community.samsungmembers.com/en_IN#/
