WiFi Calling is a feature that lets an iPhone effectively reroute mobile calls over the WiFi network to which you're connected—if it has the right qualities instead of using the cellularWiFi Calling If available for your carrier, select Add WiFi Calling for Other DevicesYou need an iPhone 5c or later, running iOS or later WiFi Calling can also be used on the iPad and iPod touch (if they have iOS 9
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