International calling services connect your call through special routes that are cheaper than standard carrier rates. You usually dial an access number, enter a PIN or use an app, then enter the country code and the full phone number.
Some services use VoIP, which sends your voice over the internet instead of traditional phone lines. Others use calling cards or prepaid balances, so you only pay for the minutes you use.
They make global calling easier, more affordable, and more flexible for everyday users.
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