As of now i am using Voxvalley Technologies VoIP Phone System For Business Communications. I never face any problem while using the service. It’s user-friendly and can be easily managed by the users.Voxvalley Technologies is one of the leading providers of reliable, innovative, and intuitive telecommunications and cloud-communication solutions.Headquartered in Singapore, with R&D Center in India, sales offices and partners across the globe, Voxvalley serves over 30 million end-users and 8000+ customers in 45+ countries.