[natas305]

My business is in this space, and yeah, basically Twilio, Google Voice or getting a number with the Burner app or Hushed app is probably your cheapest option, if you really want to go the most inexpensive route (Burner and Hushed literally just buy numbers from Twilio, mark them up, and offer them to you in a nice mobile app). Personally, I have a T-Mobile line and I just use this as my primary line around the world, since T-Mobile has free data roaming and pretty decent rates on roaming calling.