Obihai ATA and Googlevoice is all you need to make free calls anywhere in the US and Canada from your regular phone.Obihai with GoogleVoice - What's the Catch? There really isn't a catch. Sure, you have to buy the Obi ATA device, which costs upwards of $40 for the base model. Obihai devices work with GoogleVoice, Google's free unlimited phone and voicemail service. This means you can make unlimited free calls to the USA and Canada, and receive calls to a dedicated (US) GoogleVoice number. The Obihai OBi100 is hugely popular with folks who want to use GoogleVoice in place of a landline.Enjoy free local- and long-distance calling in your home courtesy of GoogleVoice. All you need is this $40 adapter. The Obihai OBi110 and OBi100 are essentially enhanced internet phone adapters (ATA/VOIP adapter) that allow you to use a normal land line phone to make/receive calls (using your internet connection) using various VoIP providers (phone service over the internet). Learn about the Obitalk shutdown in 2024, its impact on Obihai devices, and how to transition to Anveo VoIP services. Essential guide for GoogleVoice users. Call screening lets you know who's calling your Google number before you accept the call. It also allows you options on how to handle your calls so that you can choose to accept it, send the caller to voicemail, or record the call. Low international rates.It also supports High Definition (HD) voicecalling. From the device’s physical acoustics through to the digital conversion of audio, Obihai’s engineers have fine-tuned every element to ensure a crystal-clear calling experience.