My family and I use this app to communicate via face chat because most of my family members dont have an iPhone. However, I will have notifications that I have "missed" a call that I never received so the person calling via IMO has to call me and tell me they were trying to imo me...sound confusing? Well it is, basically the app doesnt connect when an incoming call is coming through. The app freezes up constantly. This is a perfect alternative for androids if it worked properly.