Alpha Caller app. This app is for Alpha Technologies and can be used to make office calls while being mobile. The app Can be used as a replacement for fixed phones or can be used in conjunction with fixed phones in your office. COOL APP FEATURES *Download and Login with extension. *Works on WiFi, 3G or 4G data services. *Includes extension where people can also reach you. *Dial from your Contacts List, History, or Speed Dial functions.