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We need voice over IP mobile dialer for our broadband telephony service. We are using A2billing.
Dialer Compatibility: G729a, G729ab codec, Ulaw, Alaw
Plate form: android, IOS, Windows, Blackberry
We need to be integrated with a2billing+voiptunnel, that customer can create an account from mobile app, and recharge his acct. from the app via paypal, also, can dial out to any destination in the world.
If you have already work on such kind of project then bid.