We need to customize linephone sdk
only bid if you have done this before.
Bu iş için 12 freelancer ortalamada $827 teklif veriyor
i have experience in asterisk, freeswitch. previously worked for void app development in Symbian platform.i had professional experience worked on sip and rtp protocol. so i think i can do it.
Yes, I have done it before. You can look my site - www.sipmobile.org. I have clients for iOS, Android and Windows phone. This price is only for one platform. Also I have a server side for this phones.