Reviews of the AT&T CallVantage
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CNET Review
The Good: Excellent technical and feature management service; detailed explanations on configuration pages; consistently strong call quality; multiple hardware options.
The Bad: Higher monthly rates than competing VoIP services.
The Bottom Line: Though its plans cost a bit more than those of competing VoIP services, AT&T CallVantage stands out for its consistently strong call quality and long list of features.
Manufacturer: AT&T
Part number: SERVATTCALLVANTAGE
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