https://www.viber.com/en/blog/2017-06-25/how-make-international-calls-free/
An extensive guide on how to make international calls for free. We will guide you through the process of international calling using your smartphone.
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https://www.justlanded.com/english/United-Kingdom/Forums/Telephone-Internet/FREE-yes-FREE-International-Calls-from-UK-Mobiles/orange-free-international-calls
orange free international calls: Came across www.free-international-calls-on-mobiles.com I can now call India free on Orange again :)
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https://www.voipstunt.com/dashboard
Free phone calls with VoipStunt . Call your online friends for free as well as a special selection of popular international destinations
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