We require a fully branded SIP client for iOS and Android and possibly Windows Phone. Ideally the client can be preconfigured with our server settings and possibly automatically provisioned with dediated username and password.
It should support all common codecs and possibly G729 subject to licensing. The main thing it must achieve is make and receive SIP calls and run in the background with access to contacts.
20 фрилансеров(-а) в среднем готовы выполнить эту работу за $2449
I have done this before many times. Kindly contact me and lets discuss more on the requirements. I would need your sip server as well as test accounts. Thanks.