Linphone Configuration & Branding for my SIP Server (with push).

I need a professional to configure the open-source Linphone for both iOS and Android. This setup is to connect with my SIP server for voice call purposes.

Key Requirements:
- Configure Linphone to work seamlessly with my SIP server for voice calls.
- Implement a push server in the configuration to enhance connectivity.
- Integrate specific branding elements into the Linphone app. This includes my logo, the designated color scheme, and the app name.

Ideal Skills:
- Extensive experience with Linphone configuration.
- Proficient in SIP server integration.
- Strong background in iOS and Android app configuration.
- Capable of implementing a push server.
- Skilled in app branding and customization.