Amazon.com.au:Customer reviews: Ooma Telo Air 2 VoIP Free Home Phone Service with Wireless and Bluetooth connectivity. Affordable Internet-Based landline Replacement. Unlimited Nationwide Calling. Low International Rates.
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The Ooma Air has substantially cut down on the number of junk calls we used to get.
The only issue I have had is it seems to lose it's connect with my router occasionally. Since i use it for business this is a substantial problem. I will try moving it closer to the router and use a cable to hook it up.