I must be missing something here. What purpose are mobile calls on planes actually fulfilling. For busniess just have wi-fi on board (no skype allowed), chat thru msn (no skype) or email. For non-business calls then I can't for the life of me think where the benefit lies for all parties (and third-parties) involved. It's just another unwanted service telecoms/internet companies think we should have - because it's another way of making green.