"Configs" shared on social media (e.g., for SocksIP ) are often unofficial and may be used for bypassing data limits; use these with caution as they can be unstable or insecure. SocksIP Configs .
Requires professional knowledge to avoid "calling issues" or security risks. Yeastar .
Provided by your specific VoIP provider (e.g., a local PBX or a cloud service like Yeastar).