PHP Based Voip Soft Phone

Hi: I want someone to design applications/voip soft-phones (desktop, web, android, ios) with the following features: Please reply/bid if you have adequate knowledge and experience. Highlights Highly secure, SIP-based softphone with exceptional voice quality Pre-defined VoIP and XMPP provider list available when adding new accounts, including Facebook and Gmail for XMPP Integration with Facebook to display contacts’ latest Facebook status Multitasking support for background operation, such as fielding incoming calls while using other applications HD audio codecs including G.722, OPUS and SILK Multi-languages along with English Standard Phone Features Multiple account support for up to 12 accounts on any SIP-compliant server Contact List and Contact Favourites leveraging the device’s native contact directory Call display and voicemail indicator Speakerphone, mute and hold functions Call history with a list of received, missed and dialed calls Call recording Ringtones and contact avatars Dial plan support Multiple call support Swap between two active calls Merge and split calls (three-way conferencing support) Call transfer (attended and unattended) Audio codecs include G.711 a/u, G.722 (HD), iLBC, GSM, OPUS and SILK Automatic codec selection to ensure optimal call quality Support for DTMF: the ability to enter numbers to use an auto attendant Via RFC 2833, SIP INFO and in-band Advanced Features Network Traversal Application Managed, Server Managed or Custom Configuration Global IP Support STUN & ICE Media Efficiency and Quality Noise Reduction Echo Cancellation Voice Activity Detection Quality of Service Security and Encryption TLS and SRTP (Secure call signaling and audio encryption) DNS SRV record lookups Call quality statistics VPN support Accessories Headset with microphone Headphones (no microphone): Bluetooth™ support: dependent on Android device and operating system