Speaking from personal experience Skype and iphone don't get along too well, iphone would rather you use Face Talk, or whatever the name of their equivalent app is instead. I had installed the Skype app on my mother's iphone so she could keep in touch with my brother (he can't afford to make long distance phone calls), but she's had nothing but issues with it. So my brother tends to contact me since I have Skype on my PC & Android.
