Other than doing it in the house to a machine / phone also in the house, never used facetime / skype or anything else with audio and video. We hear how skype charges you for phone calls, etc.
But our daughter is in spain now. called using wifi in the hotel to us on facetime and skype. Both conversations were intolerable. we'd miss 2/3 of everything she said and we likely sounded just as bad to her. In skype, we turned off video, but saw no change in performance. Facetime would drop video once in a while because it said connection wasn't that good.
are there any better apps for poor quality connections? When going around the world, are these just not as good as you would expect? I don't need video. Can I turn that off in facetime?
any other tips?