AT&T to shut down CallVantage VoIP Service. Another blow to Internet Phone?
AT&T to shut CallVantage Internet phone service
NEW YORK — AT&T Inc. is shutting down its CallVantage Internet-based phone service, according to letters received by subscribers this week. The announcement is another nail in the coffin for Internet phone service of the kind that was pioneered in the early years of the decade by companies like Vonage Holdings Corp.
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