Mobile phones voip

I was thinking at developing a java application for mobile phones that is able to make voip calls between phones via an asterisk server.

Is asterisk capable of managing voip calls between mobile phone???
(i am new to asterisk)

Yes but the bandwidth over mobile networks is not the greatest.

[quote=“psergiu”]I was thinking at developing a java application for mobile phones that is able to make voip calls between phones via an asterisk server.

Is asterisk capable of managing voip calls between mobile phone???
(i am new to asterisk)[/quote]

There are a few companies that are already leveraging the WiFi connections in Nokia phones to do just this using a variety of SIP servers including asterisk… see truphone.co.uk … or search YouTube for some of their demos… I dont know what exactly they are using onthe backend, but several nokia models w/ wifi have the sip stack built in (as long as you dont buy them thru a US Carrier)