Spotty at best! I have had Quantum Fiber since August 2024 and to say the experience has been questionable is putting it nicely. Connectivity is inconsistent and it takes days to get anyone out to fix issues. I feel like the month of December has been nothing but outage notifications. Also, don't depend on the WiFi working in the house! I had to purchase Ethernet cables to plug into the router for any computer to stay connected after upgrading o the $100 plan. And yes, we do have network extenders but even those can't connect most of the time. Shop around for something else before committing to this provider. read more

I had an extremely frustrating experience with Quantum Fiber that felt both misleading and completely unacceptable from a service standpoint. I was originally on a stable 500 Mbps plan, but after experiencing ongoing connectivity issues, I was told the solution was to upgrade to 1 Gig. This conveniently removed me from my original "lifelong" pricing plan, which already felt questionable. It came across less like a fix and more like a forced upsell. What's worse is that the upgrade didn't solve anything. My internet performance did not improve at all. In fact, it got significantly worse. I ended up completely without internet for two full days. When I reached out for support, the earliest technician appointment they could offer was several days out. For a service as essential as internet, especially for people working from home, that kind of delay is unacceptable. read more

Was great at first, but guessing the ATT purchase destroyed customer service, throttled speeds and is now charging me on 4/13 $479 for their crap $39 routers that I sent back and they confirmed receipt on 4/3. They couldn't even find them even after I proved confirmed delivery. Final straw was outtage and then service appointment 5 days out.... For those of us work from home this is a hard no. So yeah... avoid at all costs. read more

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Waited two weeks for service to be activated and installed all for it to get disconnected and called a month and three days later after usage because they decided to switch from century link to At&t. Plus the technician did not mark the activation as complete. How the heck is that my fault? Horrible customer service on the phone by the supervisor named Daisy. Now I have to wait over a week for a technician. read more

Century Link sold my service to them. It's been a nightmare! They can't answer the same question twice without a different answer. I've been without Internet for over 2 weeks and they don't know what's going on and century Link let me go. Zero do not recommend read more

The installer cut my neighbors line by mistake , leaving him without Internet for three days.. I made so many phone calls, trying to speak to someone in customer service at&T. Now they tell me they can't get someone out there for three days to fix their mistake.!! Everybody passes the buck and says it's not their department. Worst experience with and I've only been a customer for a few days. When they sign you up for service and take your credit card, they make it seem so flawless. Very frustrating when a communications company has the worst possible Customer Service... come on AT&T do better!! read more

Terrible Service to open account. Personnel will not provide a name, argue with you, and background noise that sounds like you are in an indian kitchen (nothing against indians). read more

No comment about the quality of the service... BUT a salesman knocked on my door last night at 8:30 PM when I was about to put my kids to bed. I told him to leave his info so I could contact him the next day. But he came back and knocked on my door 30 minutes later AT 9PM after I told him my kids were in bed, and his knocking made the dog bark and scared the crap out of my kids. I don't care how good your service is - if you treat families like that you can just buzz off. read more

Unethical company, stay away! If I could give them zero reviews I would. I return the equipment, have tracking information showed it was delivered to them, with a tracking number they provided. They charged me for unreturned equipment. Now, I have to fight to get this removed from my credit card read more

Quantum Fiber Services - Telecommunications Near Me - Rochester, New Hampshire

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My internet went out, and after doing all the troubleshooting on my end with the customer help, I was told a technician had to come out, but the earliest appointment was over a week away. That is completely unacceptable, especially for someone like me who works from home and relies on internet access to do my job. I tried to escalate the issue to a supervisor or management to get an earlier appointment to get it fixed, but they refused to connect me with anyone higher up and told me "they would escalate it" but my appointment never changed. I contacted them 3 times. If the delay is due to a shortage of trained fiber technicians, then the company should not have expanded its services before having the proper support in place for the high demand. When I asked how to file a formal complaint, I was told to just tell the representative on the phone my complaint. There's no email address, no survey link, nothing that allows customers to formally submit feedback so the company can actually improve. Where does that complaint even go? It certainly doesn't feel like it leads to any real accountability. This experience has been beyond frustrating and unacceptable in today's world, where reliable internet is essential. I would rather pay more for a provider that actually delivers dependable service. read more

Worst customer service ever! They buried our cable Line only 2 inches under ground. Needless to say, upon moving a sprinkler head they line was cut. Had they buried the line 6-12 inches as they are supposed to do, this would not have happened. Now they want me to wait 3 days for a tech to come out?! Everything in the house runs on WiFi. We will be canceling immediately! Save yourself a headache and call another Internet company. read more

Quantum Fiber Services - Buried 2 inches under ground! - Telecommunications Near Me - Rochester, New Hampshire

Horrible service and extremely unprofessional. I work from home and speeds are the slowest I've experienced. Additionally their techs call off and leave you without service knowing you are dependent on their service for work. My appointment was cancelled via a text at 6am , which is extremely unprofessional almd the. They reschedule another appointment for 10 days out on a Saturday that I have a funeral to attend. Representative Jason don't even offer or attempt to find another appointment time Disgusting and unprofessional! I have never been treated so poorly and will let everyone know of my experience with Quantum and after losing an immediate family member. read more

We were "migrating" Century Link customers Quantum Fiber inherited. They have shut off our service twice with basically impossible Asia based "customer service." We do not understand how an existing, functioning fiber optic line paid in full would be shut off arbitrarily twice. They have literally taken something working and broken it. We are working from hot spots from our phones until the Starlink equipment arrives. My wife's job depends on reliable internet. Notice also this is written during tax season, so downloads are a white knuckle affair. Keeping my phone on an ice pack so it doesn't overheat. read more

Wow, I wish I would have checked out all the reviews on this provider. Clown shoes and customer service. Its all-automated emails...Thank you we suck; thanks for your money are what I hear. 22 Days after you take my money with a "We will be here next Tuesday for install.", turns in to "We can't give you an answer on that now, our technicians will be out as soon as possible (they had a van parked across the street when I came home yesterday for over a half hour...thought I had a spot of luck. NOPE!) I will update this review as I go so you may decide if this is the treatment that you are willing to accept... Edit: 34 days later, no contact. No solution. No communication. No service. EPIC FAIL. I did call customer service about 5 days ago to be told they have no information on when they will resolve whatever the problem might be...they don't even know what the problem is? I do. Nobody has come out to connect my service. Over 5 weeks now, still ZERO contact with any information on a connection date. Even the automated emails are slowing down...highly recommend finding another provider in your area, they clearly do not care about the customer side of service. 2/15 through 3/23. read more

Signed up for service and on the install date no one showed up or gave any indication of delay. Multiple emails and texts were received to confirm the appt leading up to install And no one showed up. I read that that is a common occurring with quantum. Do not recommend even giving them a thought. You will be disappointed And left without service. read more

This service absolutely sucks! First off, the initial installation was botched. They are supposed to send out the crew who run the wire from the street to your house first. But for us, they sent out the final installer who comes into your house to install the modem and wi-fi first. Not once, but three times! Finally, they got that straightened out, but it took a month. So, we finally got the service up and running. After just a few weeks, their modem quit on us. I called and a tech guy tried to fix it remotely, but no dice. So the final straw was that he told me it would take four days for a tech to come out to fix it. Well, after all the crap I went through, I wasn't going to be without internet for four days, so I canceled the service and got our Cox service reactivated until Google comes to our neighborhood, hopefully soon. read more

First off I was thrilled when they finally showed ATT has bought Quantum Fiber and I can sign up with discounts applying to my internet and cell phone bill. BIG MISTAKE!! My installment was supposed to be done on 03/30/26 between 2-6 pm and they never showed up and texted me late saying they are stuck on another job. Fine, things happen so I went online and rescheduled it for 04/18/26 as that was their first available appt in my area. I get a text today saying to confirm my appt which I didn confirm. Then, an hour later I get another text saying oh we cant keep your appt tomorrow so someone will contact you to reschedule. Um NO!! I have been waiting for 3 weeks now and had to cancel other appts to accomodate them. Now they want to reschedule again???? So I cancelled it all together. I work from home and I told them I cannot have my service interrupted. If they cant even fulfill a simple installation, how much worst will the actual service be? No thanks. I will keep shopping around. This company is ridiculous. I have been with ATT for almost 25 years and they need to do better when acquiring other companies.VERY DISSAPPOINTED!! read more

They cut the Spectrum wire to my house when installing their fiber optic wires in my neighborhood. They damaged one of my neighbors sewer lines too. They then harassed me for weeks by soliciting at my door (in a no soliciting neighborhood) to try to get me to sign up for their services. read more

The worst customer service I've ever dealt with. And the tech damaged my house. Please do not use this company.

Quantum Fiber outage 4-10 at 23 am at my home near W Chatfield Ave & S Garrison St in Denver area. No reported outages. First service appointment is 4 days out on 14th. Guaranteed that they get technician immediately after 6 am phone call or canceling Quantum. Not living without WiFi for TV & iPhone for 4 days!!!!!!!!!!! read more

I have been a customer for a month and a half and have experienced two internet outages during that time. I recently learned that you are offering a promotion for $45/month with 1 Gbps speed. I contacted customer service to request the same plan, but was informed that the offer is only available to new customers. I am disappointed that the company would rather lose an existing customer than match this promotional rate. read more

Do not bother. Spotty connections and awful customer service and the line isn't even buried yet. Every time I contact, I am told everything is good on their end and it must be my devices. Stay away read more

Steer clear! Worst 2-day service experience of my life. Scheduled to install 8am-11am on Saturday. They showed up at 4pm. Wasted my whole day. After install I was only getting 200mbps, was supposed to get close to a gig. After I made some adjustments, my speed was close to the gig. after 30-min, it shut down. It seemed as though they shut me down cause of the speed I was getting. They couldn't help me on the phone. I had to set up service. Well, they told me service was out a week!! I couldn't believe it. I told them I could have a whole new provider much faster. They offered me a $100 credit. I told them to keep it and cancel. Going with Xfinity for now. I should have known better them being an AT&T company. read more

I had Internet service in Colorado, FWIW. (Not sure why I can't find any of their locations searching Yelp from the Detroit area.) I had a protracted conversation with the salesman who came to my door, who assured me at least 4 or 5 separate times that none of the equipment Quantum was giving me ever needed to be returned. I asked so many times because I didn't believe him when he said nothing had to be returned, under any circumstances. Lo and behold, when I ended my service months later, I started getting emails from Quantum about having to return their "pods". Customer service simply told me that the salesman was lying to me. So, I'll have to return the pods when I can, but in my situation, not having planned for that, that will take a few months. They'll ding me with a $200 charge for the equipment, which I can eventually get back when I return the equipment, but I'm frustrated that they weren't more forthcoming about things. They provided decent internet, but I probably wouldn't go with their service again. read more

If I could give them less stars, I would. We don't even have internet yet. Their technician was a no show on Saturday because they overbooked. We lose internet on Wednesday with our other provider, and they can't get someone out until Friday and they can't guarantee that. My card has already been charged and now I'm waiting on hold to cancel, so I can get my money back. I've been on the call for 50 minutes. What a mess! I'm going to file a chargeback with my bank. read more

They start off good for the first couple of months and then they show their true colors. Quantum Fiber is nothing more than a cover front for con artists and fraudsters. I am paid up on my bill which is not due until today when I'm writing this review, but I do not have internet. Why you may ask? Because these con artists double billed me for a bill I already paid and shut my internet off in a clear attempt to extort a double payment. Not to mention their "customer service" consists of foreign scammers hiding in third world countries reading scripts because they don't speak or understand a word of English because they can't muster up a single brain cell between them. If you are looking for honest dependable internet service this is not the company for you. If you are one of their current victims, I strongly advice doing as I did and filing federal complaints with FCC and FTC. This con ring does not deserve to stay in operation and the only way to shut them down is for everyone to file reports against them. If Quantum Fiber confesses to their fraud and makes it right by me then I will consider amending my review. read more

Essentially as long as everything is online and working they are fine; however, if there are any issues they are basically the same as having centurylink. If you've ever had centurylink you understand that they provide 0 support. They have outages without any notification and when they do provide notification it's vague and will span days. Below is an excerpt of a text message I received at 7:46 PM on the 20th of February Quantum Fiber: We're sorry for the inconvenience but an outage in your area may be impacting your service. Our team is working on it and estimates repairs will be completed by 02-21-2026 at 03:32 PM. If you scheduled a technician appointment for your location, we'll cancel it. We'll update you if anything changes. So basically, "your service is out and it might be online tomorrow, if you entered a work order, we canceled it" this was after I received no notice service outages which dropped business calls, during the three weeks prior. When I attempted to obtain the reasoning for the service outage they gave vague dismissals and no actual reasoning. The net result is their system has no redundancy, they will provide no actual status updates and they will not provide any actual information when you are experiencing an outage. Would not recommend, if you are a remote worker I think you'll have better luck with starlink as the reason I was trying this service was that I already had very bad experiences with comcast. I'd steer away from both ISPs and see what Mr. Musk has to offer, you may see a similar review for starlink from me in the coming months; however, presently it looks like they're doing far better than "Quantum". Their support team truly are a bunch of jackasses and do not attempt to provide actual service on any level. As a status update to this review, they are now not going to online before sometime in the afternoon on Monday, I'll probably have a different service provider by then. read more

Unreliable internet. I've had QuantumFiber a very short time and it has been constant outages. Seems that the merger might have some bumps but I'd rather go to xfinity than wait it out. Internet/DNS outage every week causing everyday users to just be without wifi. There are solutions for the DNS outage but it's not easily accessible for the average user. Check reddit for a solution. I have very slow speeds when I am paying for 1GB. My speeds are 64.1 Mbps download / 39.1 Mbps upload. I was told to just downgrade instead of getting a solution from customer service. Website is buggy and impossible to navigate. Customer service is useless. They don't actually track outages, you have to navigate to 3rd party sites. Good luck! I absolutely hate it. read more

Set up my Internet two weeks early before I moved into my new apartment just to ensure that I had Internet when I moved in. It was not set up properly. Had a difficult time finding an appointment when I had an appointment the technician showed up late. Poor customer service I wish I would've chose a different Internet provider. read more

good speed when it works. when its down (which is often) you have to wait 5-8 days for a technician. customer support are based in india. having fast speed isnt worth it if its down for days at a time. going back to spectrum. read more

Truly just a horrible experience. Bad customer support. They give new deals to newer customers and leave old customers behind. Charge you if you're having issues with their wifi to have someone come look at it. Avoid at all costs. read more

Forced to use this wifi at an apartment complex but it doesn't work, already need a tech to come out and I have no time to sit around and wait here while I start a new job. Wonderful start to this terrible internet service. read more

So the bad thing with quantum fiber internet is they get you with great plans when you start but when you change youre price plan that is when they get you they don't honor or try to help existing customers with new plans they are offering a $45 940mbps plan i have a $50 mbps plan and currently i feel cheated called customer service and they all say we don't have any plans for existing customers only new customers read more

I was with Century Link for 5 years and NEVER had a single hiccup.. Took the bait for quatum and have had multiple down issues.. I will be switching to STARLINK asap which works perfectly even in airplanes at 35000 feet.. Inexcusable how poor the service is and NOT reliable internet either!! You've been WARNED.. read more

Had their internet for 2 years. Needed to move. Their slow, buggy website keeps telling me to use a portal that doesn't exist, then their customer service person tells me i have to cancel my plan (they keep the money for the whole month, even if you've only used a few days of it), and make a new account (which also doesn't work on their website). So lets see, slow, greedy, unhelpful. Oh and as soon as I set an end date to my contract my internet got throttled IMMEDIATELY. Even though they're still charging me for the higher speed!! Goodbye forever Quantum Fiber, you guys stink. read more

Worst experience ever! Called 2 weeks prior to needing installation at my new home. Got it scheduled for 2-5pm. 5pm comes and goes with no one showing up. Got a text saying they were delayed but still coming. I waited until 545pm and then chatted with them, I was told my appointment was unscheduled by the installer, couldn't tell me why. I asked to get an appointment the next day but they didn't have anything until next week. We work from home so we needed it immediately. The fact that they didn't even let me know that they cancelled my appointment is very unprofessional. I will be going with xfinity. Thanks for nothing! read more

absolutely terrible customer service they will make all sorts of promises and guarantees that they will fix your problems, but guess what!? they won't do anything!!! I have had my services installed two weeks ago and the app has not worked ever since the services were installed and set up. I have contacted the company twice. And they have made promises and guarantees that they will have all of my issues resolved within three days and both times that I called them. The same answer was given, but nothing was ever fixed and I asked them if anybody's going to be held accountable for not getting the customers issues fixed they said no. Error message is attached in the review and I have also sent them this error message no matter what I click on. I get that error message. read more

Quantum Fiber Services - Telecommunications Near Me - Rochester, New Hampshire

Customer service sucks. Needed to update my payment method and was unable to do so because of some problem they have with their site. They are aware of the problem and claim they have been working to get it resolved, but they were unable to get it working during the 3 weeks I attempted to make the update. Most companies have a way to contact customer service with such problems; not Quantum Fiber. I ended up canceling my service rather than deal with them further. One would think that since they know they have a problem, they would have let me send them a check, but of course that wouldn't work, or leave my service connected while they figured out the problem. Nope. Only way to do it is to use a non-functioning site.q read more

So far not impressed. I will let you know. The installation guy whined about literally everywhere I wanted him to run it. I did not want any new holes in my house and the tech was lazy. So far have had problems with it connecting to my phone but it's now resolved it seams. Oh one last thing, sales guy promised me s26 ultra for all new and existing customer plus $20 discount on my bill. As if yet i haven't seen the discount and i was told that they couldn't get at the info on my phone for my account so just said best of luck to bad on s26. Kinda really passed about that. read more

The sales person was amazing. Very friendly and good at her job. However, the installer was not so great. When he finished the installation, he stated that the equipment would "easily" cover a 3500 square foot home. While he was still here, I pointed out that the internet speed in my wife's office upstairs was half that of our current ISP. He said "There's nothing I can do." I asked if they could add an extender for the Wifi, which he stated would not provide any benefit. My wife's office is 200 feet from the router and "Pods", yet gets 80 MB download speed when we're paying for 1GB. So we canceled while still in the trial. read more