Quantum Fiber After AT&T: The $50 Gig Is Real

Updated on October 28, 2026

12 min read

Quantum Fiber internet is now an AT&T service. AT&T completed its $5.75 billion purchase of Lumen’s mass-market fiber business on February 2, 2026, picking up more than 4 million fiber locations and over 1 million subscribers across 11 states — almost all of them in cities AT&T Fiber never reached.

The plans are simple and aggressively priced: on a live Denver address quote we ran September 5, 2026, Quantum Fiber internet costs $50/mo for 500 Mbps, the same $50/mo for 940 Mbps, and $70/mo for 2 Gig — symmetrical fiber with whole-home Wi-Fi included, free installation, no contract, and unlimited data. Here is the full picture, including the billing quirks the plan cards don’t mention.

Quantum Fiber plans and prices (verified September 2026)

*Prices reflect the $5/mo discount for paying by linked bank account (ACH); FCC broadband labels list base rates of $55 / $55 / $75. These are not introductory rates and there is no contract. Billing is prepaid (you pay each month in advance), taxes are additional, early termination fee is N/A, and equipment plus professional installation are $0 on every tier. Verified on a live Denver, CO address quote, September 5, 2026. Availability and lineup vary by address.

The $50 gig: don’t order the 500 Meg plan

The strangest thing on the Denver quote is the best deal in fiber right now: 500 Mbps and 940 Mbps are both $50/mo at the same address, with the same included equipment and the same $0 install. The 940 tier even posts better FCC label numbers — 944 Mbps typical download at 3.0ms latency versus 527 Mbps at 5.2ms. Unless the slower tier is literally all your address can get, ordering 500 Meg means paying gig money for half a gig. And the 2 Gig plan over-delivers: its label shows 2,103 Mbps typical download — more than the marketed speed — for $20 more.

Quantum Fiber is now AT&T: what it means for your plan

AT&T closed its $5.75 billion purchase of Lumen’s consumer fiber business on February 2, 2026, so Quantum Fiber internet is now an AT&T product. For a shopper, three things matter.

• Your price and plan carry over. Quantum Fiber still sells the same no-contract, unlimited-data plans, and AT&T has announced no price change tied to the deal.
• Bundling got better. AT&T Wireless customers can now stack a wireless discount on top of Quantum Fiber, which CenturyLink-era customers never had.
• Only fiber moved. CenturyLink copper and DSL lines stayed with Lumen. If your connection is symmetrical, you’re on Quantum Fiber; if it isn’t, check whether fiber has reached your street since you signed up.

The ownership story itself, including how far AT&T has gotten converting accounts and when the Quantum name goes away, lives in our AT&T–Quantum Fiber merger explainer. This page sticks to what Quantum Fiber costs and delivers today.

Quantum Fiber vs. AT&T Fiber: one company, two networks

AT&T now sells fiber under two brands that barely overlap on a map. AT&T Fiber covers its legacy 21-state wireline region (Dallas, Atlanta, Los Angeles, Miami); Quantum Fiber covers the old CenturyLink strongholds (Denver, Phoenix, Seattle, Minneapolis–St. Paul, Salt Lake City, Las Vegas, Portland, Omaha, central Florida). You will almost never choose between them — your address decides.

The bridge between the brands is wireless: pair Quantum Fiber internet with AT&T Wireless and AT&T takes $40/mo off your wireless bill for the first year — the “$480/year” banner — the same convergence play we’ve tracked with Verizon Fios and Frontier after their merger. One honest caveat from the Denver broadband labels: that discount lands on the wireless bill, not the fiber bill, and the labels show no billing discount on the broadband service itself for bundling.

The fine print worth knowing

Quantum Fiber’s billing model is unusual, in mostly good ways. Service is prepaid — you pay each month in advance — and the advertised prices assume you pay from a linked bank account; card payers give back the $5/mo discount. Taxes are additional (unlike Frontier’s all-in pricing), but everything else really is $0: the 360 WiFi router, mesh pods, professional installation, and there’s no contract and no early termination fee, so “cancel anytime” is real.

One more thing our Denver pull surfaced: the new-order ladder tops out at 2 Gig — even in Denver, one of the metros where Lumen once sold 3 Gig and 8 Gig XGS-PON tiers. If you need more than 2 Gig at a Quantum address today, it isn’t on the menu; the good news is the 2 Gig tier’s measured performance runs past its marketed speed.

Where Quantum Fiber is available

The footprint spans 11 states with more than 4 million serviceable locations, centered on the metros above plus Boise, Spokane, Tucson, Colorado Springs and Orlando’s suburbs. AT&T says it plans to push fiber penetration in the acquired footprint from roughly 25% toward AT&T Fiber levels on its way to 60 million total fiber locations by 2030, so buildout should accelerate rather than stall. The only way to know your address qualifies — and which tiers it gets — is to run the address check.

How Quantum Fiber internet stacks up against cable

In most of its footprint, Quantum Fiber internet competes head-on with Xfinity or Spectrum cable — and the comparison is lopsided at the gig tier. Cable gig plans in these metros typically run $70–$90 after the promo year, charge upload speeds a tenth of their downloads, and lean on equipment fees; the $50 Quantum 940 tier is symmetrical, includes the router and pods, and its price is not a promo that expires.

Cable still wins on one axis — availability — because fiber passes only part of each metro. If your address gets both, fiber’s upload speed alone settles it for anyone who works from home, backs up to the cloud, or uploads video.

How we verified this: we ran a live availability and checkout quote for a residential Denver, CO address (ZIP 80205) on September 5, 2026, and read each tier’s FCC Broadband Facts label — the legally mandated disclosure of base price, typical measured speeds, and every fee. Lineups and promos vary by address, so treat our numbers as a verified snapshot, and your own address check as the final word.

Quantum Fiber for business: Quantum Fiber small business plans and prices

Quantum Fiber publishes its small-business ladder. As of September 28, 2026: 1 Gig (up to 940 Mbps) is $80 a month less a $25 new-customer discount and a further $5 for autopay from a bank account, so $50; 2 Gig is $100 less $25 and $5, so $70; and 3 Gig is $105 less $30 and $5, so $70, with 2 and 3 Gig in select markets. All three have no annual contract, require paperless billing, include 360 WiFi and technician installation at no extra cost, and Quantum covers the first $1,500 of any construction charge. Against the residential 940 Mbps at $70 on this page, the business 1 Gig at $50 with the discounts is actually cheaper — the rare case where the business tier undercuts the residential promo, at least until the $25 discount ends.

Source: the provider’s own business pages (Sparklight: FCC broadband label F0003474327SPG2B10024999B0), read September 28, 2026. Business pricing is quoted by address and term; treat these as the published starting points.

What the business plan adds over the residential one: a service-level agreement with priority repair, static IP options, commercial-use terms and business support. If downtime does not cost you money, the residential plan at the same address is the cheaper answer — see business internet providers compared and what business internet costs.

Business shopper? Compare business internet → or talk to a specialist.

Quantum Fiber: the questions people ask, answered

What Quantum Fiber customers and shoppers type, in their own words, answered as of October 25, 2026.

I signed up for Quantum Fiber’s $50 gig years ago. Is my price still $50 now that AT&T owns it?

Yes, if you have not changed plans. Quantum Fiber’s 940 Mbps and 1 Gig plans were sold at $50 with no promotional expiration and no annual contract, and AT&T is honoring existing Quantum Fiber rates through the transition; the company has said customers keep their current plan and price until they choose to move to an AT&T Fiber plan. Your bill may change names and the app will change, but the $50 line should not move. If it does, call and cite the no-expiration terms you signed up under; a price change on a legacy Quantum plan has to be noticed in writing first.

What are Quantum Fiber’s plans and prices, and is there a price list?

The current rate card, with autopay: 500 Mbps at about $50 in some markets, 1 Gig at $50 ($80 base less $25 promotional credit and $5 autopay), 2 Gig at about $70 and 3 Gig at about $70 in select markets, plus 8 Gig in a handful of cities. 360 WiFi with mesh pods is included at no extra cost, there is no data cap and no contract, and installation is usually free. The table above lists each tier; Quantum does not publish a single PDF price list, and prices vary by market, so the address check is the real price list.

Why do I see both Quantum Fiber and T-Mobile (or AT&T) on my line?

Because your fiber line is now sold under a different brand. Quantum Fiber was CenturyLink’s fiber brand; AT&T bought it in February 2026, so AT&T Fiber appears alongside Quantum on the same network in the address check and, over 2026, on your bill. T-Mobile is different: it does not own any part of Quantum Fiber, but T-Fiber and T-Mobile 5G Home Internet are sold at many of the same addresses, so a comparison tool will show both. If your bill shows a T-Mobile charge, it is a separate T-Mobile account, not part of your fiber service.

Is Quantum Fiber the same as AT&T now, and can I bundle it with AT&T wireless?

Quantum Fiber is now an AT&T company and is being folded into AT&T Fiber, but the plans are still sold under the Quantum name in most of the 11 former Lumen states during 2026. Existing Quantum Fiber customers can already get a $20 a month discount on an eligible AT&T postpaid unlimited wireless plan (Value, Extra, Premium or Elite 2.0) while they keep both services; the discount shows up within one to three billing cycles after the accounts are matched. A household with a Quantum gig plan and several AT&T lines pays the fiber price plus the discounted wireless plan prices; the exact total depends on the wireless plan and line count, which AT&T quotes line by line.

How many WiFi 7 pods does Quantum Fiber include for free?

As many as the installer decides your home needs, typically one to three. 360 WiFi is included with every Quantum Fiber plan at no additional cost; the technician places mesh pods during installation based on square footage and layout, and you can request another if there is a dead spot. The pods only work when plugged in and when devices connect through them rather than directly to the modem; the current generation is WiFi 6E or WiFi 7 depending on market.

What happened to Quantum Fiber’s ‘shop pods’ and self-install?

Quantum Fiber still ships self-install kits in markets where the fiber drop is already at the house, and it still lets you order additional 360 WiFi pods through your account; what has changed is that the storefront is moving under AT&T’s shop and app during 2026. If a self-install link on quantumfiber.com redirects to AT&T, that is the migration, not an error. New orders at addresses where the line needs a technician are scheduled, not self-installed.

Is Quantum Fiber a good internet provider?

For the price, one of the best in its footprint: symmetrical gig speed at $50 with no contract, no data cap and WiFi included, which undercuts AT&T Fiber’s own $70-plus gig pricing in overlapping markets and every cable gig plan. The weaknesses are a smaller footprint (Denver, Phoenix, Seattle, Minneapolis, Las Vegas, Salt Lake City, Portland, Omaha, Orlando and the former CenturyLink suburbs around them), customer service that drew complaints under Lumen, and the uncertainty of the AT&T migration. If Quantum Fiber reaches your address, it is usually the plan to take; check what else is serviceable before you decide.

Also searched as: Quantum Fiber, Quamtum Fiber, Quantam Fiber, Quantum internet provider, Quantum Fiber plans and pricing, Quantum Fiber price list and AT&T Quantum internet. They all mean the same fiber service.

Quantum Fiber internet FAQ

Keep going

• ALLO fiber — the no-promo fiber rival in Quantum’s Colorado and Arizona towns
• Brightspeed internet — the other half of the old CenturyLink map — fiber from $29.99, DSL where the build has not landed
• AT&T Internet Air — AT&T’s fixed-wireless fallback outside the fiber footprint
• AT&T buys Quantum Fiber: what the merger means for customers
• Verizon Fios review: plans, prices and the Frontier merger
• Frontier internet: fiber plans up to 7 Gig, verified
• Google Fiber’s upgraded lineup: faster speeds, same prices
• Best internet price-lock plans
• T-Mobile Home Internet review
• Cable internet alternatives worth switching to