What Our Customers Say

“Brian and his team are exceptional. One thing I really like is doing business with other local small business owners. The Yealink phones are great, boringly reliable which is exactly what we want! I’d leave 6 or 7 stars but google only allows 5!”
-John O.

“We have received amazing customer service from Mastor-from the install of our system to assistance with issues. The staff is friendly, helpful and willing to go above and beyond to make sure issues are resolved in a timely manner. Tim has exceptional customer service! Thank you!”
-Cyndi M.

“Working with the teams at NUSO and Mastor Telecom Networks has been a great experience for our growing staff. Between the sales team and technical support staff, they have met and exceeded our expectations throughout the entirety of our 5 year relationship. They are easy to work with and always responsive when we have a ticket item to handle. In addition to handling everyday ticket items, the teams at NUSO/Mastor are excellent examples of remaining transparent and communicable through times of turmoil. During a recent Nationwide VOIP outage (through no fault of their own), NUSO/Mastor were understanding of the impact on their clientele and openly communicated the steps they were taking to repair/restore full service. Outstanding communication is what helps to create their great customer service.”
-Bryan L.

“Mastor has provided our law firm data services for nearly 20 years. Mastor is a very reliable, professional and trustworthy company with very knowledgeable, capable and friendly employees. They provide data services based upon our company’s needs. They take the time to listen and make recommendations and make sure that the customer fully understands. Over the years they have been able to anticipate our company’s needs before any issues arise. They look out for what is best for the customer. Mastor responds quickly to service calls and work efficiently and effectively until the customer is satisfied. Their products and services have always met our expectations. We have trusted Mastor for years and plan on continuing our relationship with them for many more years. I highly recommend building a communications relationship with Mastor.”
-Kelly P.
“We have been working with Mastor for the past few years and it has truly been a positive experience. We are a financial institution with 9 offices spanning from Springfield, IL to metro St. Louis with approximately 175 employees. The technicians are extremely knowledgeable and will actually share the technical know-how with you if you are interested in performing some of the routine maintenance that comes along with managing a telecommunications system. Our account manager is always very straight with us and will not attempt to sell us a technology or process that will not work for our business. When it comes down to it, all of the phone vendors out there are going to charge the same hourly rate and be able to get you any phone system you want. With Mastor, you are going to get a competitive price and service after the sale that is exceptional. No one wants to go through vendor changes often and we have found what we are looking for in a business relationship with Mastor. I consider them a valuable part of the team at the bank.”
-Joel C.
“We been using Mastor for our phone system for a few years now. I just wanted to let you guys know what a great job, you have done for our company. They set up our new phone system, which is faster and easier to use, then our old system. Nuso SIP Trunks and Epygi system is hands down the best phone system we have ever used. That was great service. Thanks guys!”
– Nicholas Minor