I have the following apps to make international calls: Viber, WeChat, Skype, and FaceTime. Are there any other apps you can recommend? Some of these apps are hit and miss and I need a reliable app to make calls to family, especially if there is an emergency. I haven't tried WeChat yet. I only learned about it a week ago. I heard it's really good and very reliable and can be used over data. Any cons to this app? Thanks!