Ecocall is a feature-rich mobile app for Android users that offers VoIP calls and SMS, instant messaging, and other functionalities. With Ecocall, users can make calls and send messages via Wifi, 3G/4G, edge, or UMTS. The app also supports cross-platform instant messaging, allowing Android users to chat with iPhone users or Windows OS users to chat with BlackBerry users.

One of the best features of Ecocall is the easy sign-up process, which only requires a user's mobile number to create an account and an automatic buddy list creation. The app also allows users to invite their phonebook contacts to install the app. Additionally, Ecocall offers the facility to enable mobile top-up.

For service providers, Ecocall is available in all major OS platforms and can be fully customized and branded as per their requirements. Overall, Ecocall is a comprehensive mobile VoIP app that offers a range of functionalities to users and service providers alike.