EE is the first UK network to build Wi-Fi calling into your phone, but what is Wi-Fi calling and why does it matter?
From 10 April, UK phone network EE's new Wi-Fi calling service will let you make calls using a Wi-Fi connection when you don't have any cellular signal.
Although it's not the first Wi-Fi calling service we've seen -- Skype and Google Hangouts, for example, already let you talk u...
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