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We need to develop a mobile VOIP dialer app to go with our callback system.
Some of the key functionality of the dialer apps includes;
Making voip calls to supported GSM number and to other sip clients.
Receiving a call from another sip clients.
Custom phonebook with better options.
Speakerphone, mute, Bluetooth options, speaker phone
Good voice quality reduces echo and noise problems.
Categorized call logs
Viewing Call logs and making call from call logs.
Viewing Topup logs.
Viewing phone contacts to call a number from phonebook, send SMS and Topup.
Making and receiving SIP calls
Contacts (Integrated address book with “search” option)
Time, call status logs
Codec option G.711, G.729 etc.
We are looking for freelancers that have experience already in developing apps like such. Looking to get the project completed in the shortest possible time.