1. Start the application in your smartphone.
2. Enter your account settings:
UserName: your SIP ID
Password: your SIP password
SIP Server: SIP-domain address from registration email
3. If login is successful you will see the numpad.
The softphone is ready to use!
4. Also you can make advanced setting of softphone.
Tap Settings button to do it.
5. It is recommended to use PCMA and G.729 codecs.
6. Select Preferences, then set DTMF Type to RFC2833.