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Android / Apple phones offer a service calledWiFi calling which enables a user to make calls, send and receive text messages over WiFi network, when

Android

/

Apple phones offer a service calledWiFi calling which enables a user to

make calls, send and receive text messages over WiFi network, when available,

rather than relying on a telecom operator. Using an space

-

time diagram explain

how a WiFi access network, an IP network and a telecommunication network

interact to enable WiFi calling.

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