quantumfiber.com Reviews 1,043

TrustScore 1 out of 5

1.2

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Review summary

Based on reviews, created with AI

Most reviewers were let down by their experience overall. Many people were dissatisfied with the service, citing frequent and prolonged internet outages, inconsistent network speeds, and issues with connectivity. Customers also found the customer service to be awful, describing staff as unhelpful, rude, and difficult to understand, often leading to unresolved problems and long wait times. The website was also a source of frustration, with users reporting it to be useless and difficult to navigate. Some people, however, mentioned that when the service was working, the internet speeds were fast and reliable. A few customers also had positive experiences with installation technicians, describing them as knowledgeable and professional.

What people talk about most

Service

Customers had negative experiences with service, frequently reporting disconnections, slow speeds, and... See more

Customer service

Customers consistently express extreme dissatisfaction with customer service. Many reviewers describe the... See more

Technology

Consumers find technology to be ambiguous, with many reporting significant issues. Some experienced frequent... See more

Staff

People report negative experiences with staff. Many reviewers express dissatisfaction with customer service... See more

Website

Reviewers highlight negative aspects of the website. Many customers report that the website is a "waste of... See more

Based on these reviews

Rated 1 out of 5 stars

Service so bad it's shameful. Wifi cuts out multiple times per hour, sometimes in quick succession. Network speed is wildly inconsistent at all times of day, and sometimes downright unusable. Seems to... See more

Rated 1 out of 5 stars

I called Quantum Fiber yesterday to ask a few questions. When I didn't sign up immediately, I was transferred to 'Chris', apparently their high pressure sales manager. He was insulting, condescendi... See more

Rated 1 out of 5 stars

Customer service is awful. It took four days to get a technician on-site to fix my connection. That’s four days without internet. Then the service dropped out again three days after that. Scheduled a... See more

Rated 1 out of 5 stars

If I could provide a lower rating, I would. My building only uses Quantum. But, through a series of errors with Customer Service, I cannot get service. It has been 17 days that I have been without... See more


1.2

Bad

TrustScore 1 out of 5

1K reviews

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Hasn’t replied to negative reviews

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Rated 1 out of 5 stars

I scheduled an appointment 2 weeks in…

I scheduled an appointment 2 weeks in advance, the day before they pushed the appointment out another 2 weeks.

I called, the lady on the phone was not local and she had zero problem solving skills. Said she could not contact office, management, or the technician.

She said there was no record of the app being rescheduled. And made me get online to reschedule the appointment. She would not reschedule myself.

I drove to their office in Las Vegas which was not their actual address.

12 March 2026
Unprompted review
Rated 1 out of 5 stars

Worst Company EVER!!!!!

I am not one to post bad reviews but in this instance it was a must! I moved in to my new apartment which contracts with Quantum so I didn't have a choice on who I could use. They told me they were not affiliated with Century Link (a service I despise). The truck shows up with Century Link down the side, the modem is Century Link, the bill is Century Link. One day I need help with something, I call customer service to get someone who doesn't speak English (after having to press one for English) to get someone NOT even in the US!! There have been several times throughout my lease the service was down (not just my service but the entire complex) almost two weeks at a time with NO compensation. Fast forward to me leaving that complex. I put my 60 day notice in and try to transfer service to my new apartment. They tell me there are no transfer capabilities. I said fine I want to cancel my service and I will get it somewhere else as well as I do not want to be billed on the 7th because I will be gone on the 3rd and not even have service. Not only did I get billed AGAIN, they didn't cancel my service. I have gone online with nothing working, chatted twice with saved transcripts proving what was said, waited over an hour and 45 minutes...twice, and only got a human today. I am not even at that complex and can show proof of my new lease they will not refund for this month knowing I'm not there and told me in order to issue a credit for time not having service I had to keep the current account open being billed, yet AGIAN!!! He would not let me speak, kept talking over me and instead of trying to help, continued telling what I wouldn't get. Service SUCKS! Customer Service is INCOMPETENT! The company is CROOKED! I would rather use my mobile hotspot than to EVER get Quantum service again!

13 March 2026
Unprompted review
Rated 1 out of 5 stars

Horrible company

Horrible company! Have people coming to the door as late as 9 p.m. They treat their employees like crap. No respect for the late time or 'no soliciting' signs. Promise employees greatness with no results..have these kids work in the pouring down rain 6 days a week..10 hours a day..commission. Any company that treats their employees like this is and always will be a NO in my book even if they offered it for free!

12 March 2026
Unprompted review
Rated 1 out of 5 stars

4 cancellations

I can't rate performance of this internet because unfortunately the team was never able to make it to us for an installation. We were cancelled on 4 separate times before we gave up and decided to go back to Xfinity.

The sad thing is we really were excited to try Quantum, but we had to use a hot spot and use up data on multiple occasions while waiting for a technician that never showed up. As my husband and I both work from home at times this was incredibly inconvenient and costly for our data plan.

We did end up calling customer service 3 times and were given different answers - we were told the technician cancelled (and did not explain why) and each time they rescheduled a new appointment for us. Twice for those new appointments - that the customer service scheduled - we were told after-the-fact when we called in that no appointments were scheduled. Despite having confirmation in our account inbox of the times that were also confirmed for us verbally.

I would say choose at your own risk, either their technicians are overbooked or their team or system is faulty for appointment scheduling. If you need internet quickly I wouldn't recommend.

11 March 2026
Unprompted review
Rated 1 out of 5 stars

Horrible service - no internet for 6 days!

We lost internet Tuesday night. Did the usual to see if we could get it working, i.e. reset router, check cables etc. Wednesday we call the servicedesk and are being told that they can't send a technician out until Monday. That is 6 days from now. Me and my husband work from home, not an ideal situation to say the least. They did absolutely not give a toss, they don't care if we can't work or not. I would go with another company if I could

11 March 2026
Unprompted review
Rated 1 out of 5 stars

Signed up a month ago in Las Vegas zip…

Signed up a month ago in Las Vegas zip code 89135. Got an installation appointment which was cancelled last minute. Called customer service and they said they had to get a technical team to the area. Since then I’ve been waiting two weeks with nothing but weekly updates “thanking me for my patience.” Customer service has no answers, and I can’t get any local phone number to call. I guess I have to cancel and go to Cox if I want any service at all.

8 March 2026
Unprompted review
Rated 1 out of 5 stars

What Even Is This Crap?

What even is this crap? First they dig up my yard without notice and mess up the line and yard. Yard is still messed up. Second, the technicians comes out and can't even complete the job because the First people messed up when they buried the line. So for weeks there was a line on top of my yard, front and back, super cool and not a tripping hazard whatsoever. Third after the install was officially completed a month later, my service goes out every day. It seems like it will be a sunny day and a brisk fart will take out this internet. Fourth, you call customer service and they tell you nothing is wrong, it is just you. Great gas lighting technique. Fifth, they said they scheduled someone to be here but the person never showed up and they told me, we weren't home. Well, we work from home and were on the phone at the exact time they said we weren't home. Sixth, they refused to give me to a supervisor or a manger, somehow the manager is always on the phone. My internet still doesn't work and I switched from COX crap to this crap.

4 March 2026
Unprompted review
Rated 3 out of 5 stars

AT&T takeover ruins another good business

Quantum fiber was great but AT&T just bought it and is already ruining it. Apparently AT&T doesn't care about low income users because they won't do the Lifeline discount. This is messed up and I'm sure only the beginning of AT&Ts shit-ification of a good company.

5 March 2026
Unprompted review
Rated 1 out of 5 stars

Outages - extremely so to fix

The past month, we have had multiple days without Internet. With a wife working from home not being able to work is extremely frustrating. Currently going through a service outage that is going to take five days to restore. Looking for other providers. Nobody was helpful on the line. Chat is just a bunch of robots.

28 February 2026
Unprompted review
Rated 1 out of 5 stars

Horrible customer support

Horrible customer support, tech stuck in the 90s, billing scams and impossible to talk to anyone live when you have problems or want to cancel but, of course, if you want to upgrade support staff is 30 seconds away. sh** company.

28 February 2026
Unprompted review
Rated 1 out of 5 stars

Quantum Fiber says 99.9% reliability in…

Quantum Fiber says 99.9% reliability in every advertisement. I’ve been without internet for 3 days now. Technician was scheduled today 8-11. No show no call no text no email! Still no information! Called multiple times. Now rescheduled tomorrow late afternoon and do not have any confidence they will show up. 0.9% reliability! If that.

26 February 2026
Unprompted review
Rated 1 out of 5 stars

These people are major ripoff artists

These people are major ripoff artists. Quantum does NOT care if your computer is not compatible with fiber optics. They will not tell you that this might be a problem. They will not ask you. They just sell you the service and have the technician out to your house to bore holes in your wall in a few days time, hardly giving you, the customer, time to reflect.
Now I have their big white boxes hooked to my wall and NO WAY to use my work laptop on their internet service and they do not give a rip. This is legalized THEFT.

26 February 2026
Unprompted review
Rated 1 out of 5 stars

If I could give less than 1 star

If I could give less than 1 star, I would have. I pay, they loose my payment. I have proof, they don't care. I call, outsourced to a foreign country. Hubs break, need parts, wait on hold for 2-3 hours. The worst services.

26 February 2026
Unprompted review
Rated 1 out of 5 stars

HeadlineThe Bait-and-Switch Migration

Headline: Forced migration, zero flexibility, and non-existent customer service.

I was virtually forced into switching to Quantum Fiber after they took over CenturyLink accounts in my neighborhood. I was told my service would essentially be 'sunsetted' if I didn't move over.

On the day I signed up, I tried to move up one speed tier. I was told I couldn't change my plan until the equipment was installed. Now that I’m installed and 'active,' they refuse to honor the new customer pricing for that higher speed because I am now considered an 'existing customer.'

The 'support' experience has been a nightmare:

Chat Agent 1: Disconnected the chat when I asked for an escalation.

Chat Agent 2: Claimed they had no way to escalate and ignored the context of my request entirely.

Supervisor: Admitted their system 'literally doesn't allow' them to adjust pricing, even for a brand-new migration.

It is clear Quantum Fiber prioritizes rigid billing systems over actual human logic or customer retention. If you have a choice in providers, look elsewhere.

26 February 2026
Unprompted review
Rated 1 out of 5 stars

Quantum Fiber is one of the worst…

Quantum Fiber is one of the worst companies I have ever worked with, and there internet is not great! When working on my computer I am always having to Reconnect! But this is not the worst, here is my story. First we had someone come to our door to discuss Quantum Fiber and we were not interested at the time. Next thing we know people are jumping over our fence to get in our backyard and install a tower. One of the Quantum Tech Supervisors came out and advised the tower was placed in the wrong location and should have been in our neighbors yard behind us. I was livid that people were jumping our fence to get into our yard. If it needed to be placed in our yard and we knew when they were coming out we would make arrangements or have them change the day so we could be home and let them in our yard. Next thing we decide to quit Xfinity due to high costs and go to Quantum Fiber, would have gone with someone else, but we only have Xfinity and QF to choose from in our area. They installed the lines, I also wanted landline service, so they did that and I was told, Yes all the phones in your house will work, well that was not true, only if we paid an additional 60 or 70 dollars to add our upstairs phone. So we just left it and chalked that up as the company employees really do not know what they are talking about and should get their facts correct before talking to customers. Next thing we know we do not have any internet, phone or tv service (lucky I have an arial so get the local channels). Come to find out someone had cut our line by the box. So they decided to use the box in our yard. The young man restrung all the line and we had service once again! However, it happened again, and was told it was disconnected at the box. This is completely unacceptable! Had that repaired and once again it is not working! So apparently, someone probably has disconnected once again! Apparently, their technicians are not familiar with the system and need training. When my system is down I do not have internet, phone, Ring and/or Ting! This is unacceptable and they have advised the first appointment is not until Wednesday, March 4th, this so complete unacceptable! I will begin looking for different providers, as this has gone on long enough!!! Ask for Supervisors to be notified and once a young man came out I was explaing the problem and said it was unacceptable and people should not be coming in our yard without our permission, and his reply was, "Then win Publisher Clearinghouse so you can move!" REALLY!!!! This is how you treat your customers!!! I will placing reviews on as many sites as I possibly can to warn customers of this company

25 February 2026
Unprompted review
Rated 5 out of 5 stars

ALL I CAN SAY IS WOW!

8gigs up/8gigs down - as promised. it took some patience to get here, but Josh from corporate was awesome and helped me resolve my communication issues with CS. the many techs that took part were all really nice guys - knowledgeable, professional, and polite. when i ran that first speed test last night, i swear a tear dripped out. as a whole, they've got a few kinks to work out in the CS side. (the app works INSTANTLY for communicating via chat, i've never had to wait, but comprehension/communication, thats a whole different story. overseas call centers just suck.) nothing is ever perfect, but i have to stay i now have the ability to tell COX to GO F*** YOURSELF!!! and i could not be happier. Quantum is awesome and it was worth the wait....

25 February 2026
Unprompted review
Rated 1 out of 5 stars

DO NOT USE!!

DO NOT USE!!! 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.

25 February 2026
Unprompted review
Rated 1 out of 5 stars

I have been trying to cancel my service and keep getting charged

I have been trying to cancel my service after moving for a whole week now. It is pretty much impossible just to cancel it online; instead you have to chat with an agent (good luck getting a real person). They will keep telling you that they are processing the cancellation but keep charging you. They took $75 out of my account every time I reached out trying to cancel and it is still active. 0/10

24 February 2026
Unprompted review
Rated 1 out of 5 stars

Quantum fiber is awful

Quantum fiber is awful. I had less issues with my regular xfinity WiFi… and that’s saying something!!!! It’s always going down, the connection is nowhere near as strong as should be! I pay for up to 3 gigs per second and I receive 300 mbps if I’m lucky. Their customer service is a joke, they never sent the WiFi extenders they promised, it’s been months and they still haven’t buried the fiber cable, the app takes 30 seconds to boot up, quantum fiber is not worth it !!! I feel bad for dogging on xfinity now that u have this crap. But I already called and I’ll have my xfinity internet back the day before I cancel my QF. NOT WORTH IT PEOPLE!!!

23 February 2026
Unprompted review

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