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Go to http://voice.google.com
Sign in with personal gmail address
*****dont have one, register for one (it's free)*****
Choose are a phone number by are code follow the instructions to activate
https://www.youtube.com/watch?v=Q6FOQtaOG1E
Download Google voice app in App Store on Iphone or Play store on android
Make the phone calls and send txt messages, using the app.
****This is only optional if you want to use it, this just hides your personal number.