You'll need it more than once, unless you plan on tossing your account before they ever do the followup calls. If you intend to keep your account, expect them to call from time to time. That's why I use real numbers and keep them active. If they do a follow up and you don't directly answer with your living breathing self, BOOM - limited.
With google voice, you can bypass that auto message and have it jump direct to your phone immediately.
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