I recently contracted phone and internet service for my business through Cornerstone and I have…read morebeen very happy with the service and support they provided. The phone system uses quality hardware and has a lot of functionality, and the internet service has been fast and reliable. Every Cornerstone employee I have interacted with has been friendly and knowledgeable - sales, install, and tech support. My entire experience with Cornerstone has been way better than what I encountered in the past when I was using a cable provider.

Stay far far away from Cornerstone, particularly from Ed in customer service. When my father died,…read moreI called Cornerstone to cancel his business phone lines. Cornerstone shut off the phones, but continued to bill his estate for months. Then they shut down our home phone line due to the account not being paid. I called to resolve the issue, and Ed told me, verbatim and in a snarky tone, "I can absolutely shut off your home phones!" He then insisted that we personally pay my deceased father's business line debts before we got our home phone line back. He was incredibly rude, had no interest in discussing options with a family in crisis, and to top it off, he put me on hold for an extended period of time to have a personal conversation with a girl in his office. I know this because I heard him begin the conversation before putting me on hold. I later found out we were being double billed for our internet, once from Time Warner and again from Cornerstone. I immediately switched my phones to Verizon. I suggest you stay far away from Cornerstone. I've never had less pleasant customer service experience, and I feel robbed by this corrupt company.

Super unprofessional, the sudden charges, expecting the customer to pay for an employees…read moremishandling of our account, and basically muscling us to pay a portion when it was obviously their fault, in order to get repairs done. When we needed the services to be done, the service person continually called the wrong number for me, (which they have my phone number on record) because it's my husbands and he was traveling out of town, somehow someone had that number and obviously he was busy to take a call. I own the company, I own the building, I have my name on the bill, but they send the bill to my husband :/. I had to yet again, tell them who the boss here is, and who pays the bills. Atrocious.

Our initial contact began after 35 minutes on hold. After learning the details on their offers, we…read morerequested an appointment for a site survey and install. The salesperson took our information and said the next available appointment was the following Monday. We asked if Saturday might be available. He said he'd check and get back to us, but never did. We called again at the end of the week to check the status of our appointment and found out there was none. Our third call was on a Monday morning to request an appointment on Tuesday. The technician showed up just before noon and let us know that the signal was too weak to be useful. Bottom line: a waste of time.

Only T-Mobile store I will go to! Best service around! Jose was awesome and got us set up with no…read moreproblems and was very thorough with the setup making sure I got everything transferred over from old phones to new ones!!

Do not come here. Was consistently told by their employees that equipment that 'came with' the plan…read moredidn't add anything to our bill and come to find out that they lied to us. By the time we figured out we've been charged for it, we were over our buyer's remorse time frame. Disappointing, misleading, and dishonest business. Terrible practice.

I was looking for a T-Mobile to get my new phone set up. I'm also a new customer to T-Mobile as…read morewell. There is a young man there, his name is Mack. I would strongly suggest you make sure he's working when you visit. He is very knowledgeable and efficient at transferring services, as well as transferring my old phone's data to my new one. The store is clean and well organized. He gave educational advice in reference to the t-mobile app and all the perks I get with my monthly charge. He assisted me in accomplishing why I was there and I left a newly satisfied T-Mobile customer! Thanks Mack!

This T Mobile Store on the 2nd Floor in Colonie Center has always, every time I go there, gotten me…read moreout of phone problems and fixed my phone. Their two employees , namely Gazelle & Ian work through all my phone troubles. Explain every question I ask in detail. They are determined to fix my phone. When I go to other T Mobile locations, they don't give any effort in getting me out of my phone troubles. I have been to T Mobile in colonies center, 2nd floor several times and they are always so polite and so helpful. Even when they are swamped with customers they do not rush. I will always go to this location when i have phone issues. I will always hope they are working there, unless they get promotions, which they sure do deserve. Don't want to get too corney, but they really do go above and beyond and make sure you understand the problem in case it should do me up in the future.

All phase cable gets the job done right the first time! Pat owner and operator of all phase cable…read moreis nothing short of talented, respectable, responsible, and professional! Hes done a multitude of work for me from running cable lines to installing electric baseboards and even recessed lighting! But believe me when i say there nothing this guy cant handle!

From the owner: Specializing in low voltage installation including but not limited to Cat 5 & 6 data, coax rg6 &…read more11, IT room clean ups.