Mobile soft Phone for Android/windows/Apple

Hello Friends, We are India based and looking some good freelacer or company who can build a mobile sip softphone for us. that softphone must have all call features and locally store call details on device like dial/missed/received call. Softphone must be able to support audio and vedio calls with suitable codec. G729 is must for this. Users will be able to add multiple SIP accounts. if you already developed this kind of soft-phone, share the demo link. if you are from Meerut/Delhi or near by Delhi NCR we will provide you first prefance to him/her. for reference "Zoiper" and "Xlite" you can check. before bidding see the attachment.