首先你要有一个美国sprint的账户和号码。

按照提示激活wifi calling
https://www.sprint.com/en/support/solutions/services/faqs-about-wi-fi-calling.html

The Registered Location Information can be updated on your device.

iOS devices: Go to Settings > Phone > Wi-Fi Calling > Update Emergency Address.

Android devices: Go to Settings > Wi-Fi Calling.

然后你就可以收听美国电话了,然后激活google voice

换号码可以参考 http://googlevoice.net/index.php/archives/41/

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