Some of the popular features which have been implemented are:

• VoIP Calls using 3G, 4G & Wi-Fi Internet
• Hold, mute, speaker, keypad display
• Phonebook integration and ability to call/chat from phonebook directly
• VPN Tunneling to pass through any firewall or blocked network
• Call Through and Conference Calling
• Support for G729, G711, ulaw, alaw, video codecs
• Social networking with Facebook, Twitter, Linkedin etc
• 1-1 Chat and Group Chat
• Ability to Share File, audio, video, location. Emoticons during chat
• Free/Paid Ads integration for revenue generation