iPhone application to make voice call

I'm trying to make an iPhone application. In it, I want to add a module to make voice call using this application (msisdn is our input). Is this possible? I开发者_如何学运维f so, what is the result in iPod Touch?

Any body know how to notify push registry in iPhone? I can see in some site it is available in iPhone.

Generate a call, sms, etc from iphone

You should take a look at the Siphon project: http://code.google.com/p/siphon/

Are you trying to replace the dialer application, or simply invoke it? On official phones, the dialer cannot be replaced or have another application provide that functionality.

[[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"tel:1234---"]];