Nextiva is a VOIP phone-system provider whose feature-rich solutions are adaptable to businesses of all sizes.
Virtual Phone System
This virtual phone system is designed to work on your existing mobile or landline and includes features like custom greetings and call handling.
One of the best companies on the market catering to this growing need is Talkroute.
RingCentral’s VoIP phone system is easy to set up and allows you to make calls from both your desktop and mobile devices