How to use Wi-Fi calling and make phone calls even without a cell signal

Wi-Fi calling can come in handy when you're traveling.
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Wi-Fi calling allows you to make calls using a Wi-Fi connection instead of a cellular connection.
Wi-Fi calling is available on nearly every popular phone, and nearly every major cell carrier lets you use it for free.
If you have spotty cell service, Wi-Fi calling is a great way to make sure your calls don't drop.
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If you've had a cellphone for a long time, yo