Google Voice is most likely the simplest to use of all virtual phone number providers. Home, mobile, and work phones can be added in a matter of minutes. Once the phones are linked, calls and SMS messages can be received any phone chosen by the user. Users can also use their phone or web interface to answer the messages they receive. Google Voice transcribes voicemails immediately and sends user notifications through SMS and email messages.
With the Garden plan, you can access the Smart Escalations advanced phone number forwarding service. This service lets agents send cases to colleagues who have more experience or authority. Other call center features include call barging, warm transfers, and holiday calendars. This plan costs $29 a month, per agent and includes 2,000 free incoming minutes every month.

Phone.com is another fairly-priced business phone system that offers three service plans. Their pricing ranges from $29.99 to $59.99 per month. Their features include unlimited calling to select countries outside of the United States, faxing, and SMS messaging. They also have a full range of add-on features allowing you to customize each of their plans.
In this mega guide, we break down what you need to know about the best VoIP phone solution. With numerous phone systems on the market, it can be tough to choose the right one.