UniTel Voice is a PBX provider that offers a complete virtual phone system to small businesses and home business owners. Through their Virtual Office Phone System, Unitel helps businesses and companies stay connected and sound professional. UniTel stands apart from other service providers in two ways: dedicated customer service and network reliability. 

Some of the users review:

I have had call centric for about 5 years now, they have had a few rough patches as well as some individuals taking advantage of their programs. The free phone number program is gone. Now there is a $1 per month DID charge but this is specifically restricted for limited residential use. If your use is for a home office or business purpose you have to go to a office unlimited plan for $8.95 per month and then add an outbound calling plan, i use the 120 min for $1.95 charge which includes the taxes related to 911 service. Overall I now pay $10.90 per month which is still less expensive than the other SIP plan providers. I like most of the features, but a little dejected that if you have voicemail activated then every call will end up routing to voicemail. For one of the numbers I had calls could not go to a voicemail. The only way to do that was to cancel the line and order a new account. Now that free phone number has stopped I have cancelled all the lines on that account and just have a internet phone number only with the voice mail.