Android VOIP/SIP Softphone APP

VoIP/Sip client Android APP

first of all the app must be fully encrypted. this app must me done with the SIP protocol standards.


Basic Features:

Incoming Calls
Outgoing Calls
Mute Calls
Hold Calls
Transfer Calls
Integrated Call History
Contac List
change CallerID before calling or fixed
optional: Send random caller ID before call.

Advanced Features:
voice/speech changer integrated to the calling app
Multiple SIP accounts setup
SIP Account information hidden after initial setup
DTMF (telephone tone) support using SIP INFO or RFC 4733
Provisioning via QR Code


SIP TLS transportation
SIP UDP transportation
SIP TCP transportation
Audio codecs: G711, G729, GSM, G722