Holla4Adroid is a free SIP based application developed by hollatech Soft, UK for making and receiving voip, PSTN, GSM calls via WiFi or 3G connection.
- Access your locally stored phone contacts from the app
- Browse your call history
- Send text messages
- Subscribe/Buy credit & Top Up
- Speakerphone/mute function
- Optimised audio profiles for many popular Android handsets