If you encounter the message, “This phone number can't be used to sign up for a Google Voice number. Try verifying with another number,” it likely means your phone number has already been used to register for Google Voice.
Why Is This Happening?
According to Google, this may occur because:
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The number has been used by you previously to request a Google Voice number.
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The number previously belonged to another user who registered it with Google Voice.
How Can I Fix It?
- Use a different phone number that hasn’t been registered with Google Voice before.
- Contact Google Support if you believe the restriction is in error or need further assistance.