Hi,
I can customize linphone for you, First I will design it and then i will customize it for your service, user only have to enter their username / password
About me
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I am from Pakistan having 13 year experience with CTI (Computer Telephony Integration) and software development and have solid command on telecommunication related technologies, protocols and applications for example Asterisk, Freeswitch, OpenSIPs, FreePBX SIP, SMPP, IAX, WebRTC etc ... for details please visit my profile.
Regards