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wifi calling using csipsimple or other
I have a motorola razzr M and am going on vacation out of the U.S. I have heard I can make free calls if im connected to a wifi spot. Do I have to join a wifi calling service like google voice or skype to use the app csipsimple? Or can it be used on its own.
What I want to do is have a U.S. phone number and call from Trinidad/Tobago back to the U.S. and have ppl be able to call my cell phone from a landline or mobile phone to me while i'm down there, would I have a U.S. number so that they would have no charges . . . this is all very confusing to me. Thank you.