Build a SignalWire VoIP Dialer for iOS / Android with Voice, Video,SMS, MMS and visual voicemail functionality.

I am looking for someone to build an VoIP dialer with a call kit integration for pushing calls / video/ texts / multimedia and short codes with signalwire to iOS / android devices. This should be built on top of signalwire. These apps will be hosted to Apple / google for initial testing phase for us and be able to globally white labeled and branded in second phase for us with our brand. It will be hosted on custom servers or cloud servers (lightsail, digitalocean, etc if need be) and should not be containerized. This has to have following screens and codecs. ( design pictures are attached for better understanding of the project ) This app will have following screens : [login to view URL] account management screen ( sip URL , account iD, access token , username and password screen with auto log in toggle ) 2. Dialer screen ( with recent, contacts , keypad, IM, settings and VM button by long pressing 1 Or at the bottom ) 3. Ability to add individual signalwire accounts in one app and keep the connections open for all registered numbers / account at all the times 4. Ability to send and receive text message and multi media messages, long codes , short codes within the app through signalwire account to any number in USA Canada 5. Setting screen requires preferences for customizing look - register deregister accounts and advance settings see all customization options in pictures [login to view URL] call / video call (answer decline send to visual voicemail ) 7. Outbound call /video call 8. Contact list 9. Call history / recent 10. Sms/mms sending receiving 11. Overview of messages by contact / phone number / sip ID 12. Individual message thread 13. Voicemail - listen, record greeting, delete ( downloadable to app when needed from signalwire and deleted in sync) See more : send sms, mms, receive sms,mms midlet, VoIP trial test calling, VoIP softphone skins for both iPhone and android phones, visual voicemail, srtp, use signal wire test account to build a complete solution for one number and ability to add more numbers in a same account or creat more signalwire account seamlessly to work with this app. Open h264 sip video. And all audio codecs for 3G,4g, Wi-Fi data. Call kit integration is a must ( even if a phone is sleeping - app must run in background to revive phone calls and text messages constantly ) is a must. . suitable applicants must adhere to design guidlines for easy access to signalwire accounts by novide usars and activation and access of their accounts by this app. Please understand that Signalwire will be the backbone for this app and this sip/chat/video/vm dialer must function seamlessly with signalwire as well with as most North American phone numbers and 1-800 number calling to and from this app including all no caller Id incoming calls even when the phone screen is not lit.