I have installed Voillo on my Android phone, but when I am dialing it shows "the dialer is not registered yet". How can I register?
The Voillo application is just a client that connects to a VoIP server. You have to obtain those details (username and password) from a local reseller which supports the VoIP. However, to make this easier, contact the developer using the email on the application's page. He should give you a list of supported VoIP providers and inform on where to acquire an ID from.
Email support: [email protected]