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I am seeking a VoIP enabled "SIP" mobile dialers that can work with ALL the mobile platforms like Symbian, Android, Windows Mobile, IPhone (iOS), and BlackBerry. The following are the features I expect to find:
1- PIN-PIN calling (Subscribers can call each other)
2- Subscribers can chat and send files with each other.
3- The dialer should show the credit
4- Call control (Call ID, Speaker, hold, conference, call forwarding, VoiceMail, ... etc)
5- MOST IMPORTANT: The dialers should be working in countries where mobile operators block SIP calls over 3G, I believe that there is a term that commonly used, I believe its called VoIP Tunneling "That will bypass the calls over the mobile operator restrictions, and usefull in low bandwidth areas as because of this technology that the call in a typical enviroment that would reach something around 9 kbps with a crystal clear voice
6- There should be a feature where the user can set his CLI "to set the number that will be shown on the called party" (assuming that I am using White routes that passes CLI)
7- SMS enabled like we can integerate it with SMS providers, I guess they use HTTP, SMPP, SMTP, or FTP