– Useful App : Sidecar

 
Engadget
 
Make free calls in US and Canada with Smartphone APPS:
Talkatone(Using Google Voice Number), GrooveIP(Using Google Voice Number), Sidecar
 

  
1. Install and Click Sidecar app
 

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2. Enter your Mobile Number and Name
 
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3. Sync your phone’s Address Book to Contacts
 
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4. Make free calls in US and Canada
 
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5.
 
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6. Whisper
 
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