Advantages of a inbound(toll-free) number:
There are a number of potential benefits to provide an inbound number for your customers. The most obvious benefit is that it provides a way for customers to contact your company at no cost or a flat rate to themselves.
Credibility- It gives your company a certain amount of credibility because it tells the customer that you take customer service seriously.
Consumers like toll free numbers - Because they're cheap to call, customers are more likely to call you if you provide a toll free number. As such, you'll find much higher response rates to your marketing initiatives when you offer a toll free number.
Reporting and Routing Capabilities - Inbound numbers have call reporting and routing capabilities that local numbers don't have.
Toll free numbers are portable - A big advantage of toll free numbers for small businesses is the ability to change the answering point. If you move your business, all you have to do is change the answering point for your inbound number, and there's no cost to do it.
You create a big company image - Toll free numbers create a strong corporate image. Give your customers an inbound number and they'll be impressed. They'll never know that you are running your business out of your home office in the basement.
Expanded marketing reach - Toll free numbers give you a national presence. These days, if you want to market outside your local area, you pretty much have to offer a toll free number to be credible.
Scalability - Another benefit for smaller start up businesses is that you only have to pay for the usage or calls to your toll free number. If nobody calls, there are no call charges apart from your monthly access fee. Your bills will only increase as your business grows.