'What is Wi-Fi calling?': How to make calls from your smartphone even if you don't have a cell signal

'What is Wi-Fi calling?': How to make calls from your smartphone even if you don't have a cell signal

Business Insider

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· *Wi-Fi calling is a service that allows you to make phone calls over Wi-Fi, if you don't have a reliable cellular connection.*
· *Wi-Fi calling is built into nearly all modern phones, and usually comes at no extra cost.*
· *The sound quality on Wi-Fi calls will depend on the speed of your Wi-Fi connection.*
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