That is a great question about the Skype apps. The short answers are: no you can’t uninstall the VZW stock app. However, you can use the Skype mobile app on wifi or abroad. There is no option to install an app over another app. The Android platform is not an OS that supports that kind of application feature. If you install the Skype mobile app it will not cause any problems have two different versions of Skype on the phone. I hope this helps. Thanks.