Knoxville's internet market has an unusual feature: a wireless provider reports service at almost as many locations as the cable company. In FCC filings for Knox County, Xfinity reports cable at close to nine in ten serviceable locations, and T-Mobile Home Internet, which delivers home broadband over its 5G cellular network, reports nearly the same share. AT&T Fiber reports fiber at roughly half, and Spectrum reports cable in a small slice of the county. Verizon 5G Home and AT&T Internet Air also report fixed-wireless service, at roughly seven in ten and four in ten locations; T-Mobile is the one included here because it reports the widest wireless reach. That gives Knoxville three genuinely different technologies, each reported at half or more of Knox County locations and each with a distinct trade-off: fiber's speed and matching uploads, cable's range of tiers and promotional pricing, and 5G's single flat-priced plan whose speed depends on the signal at your address. This comparison explains what each technology does well, where each one falls short, and how to pick between them for the kind of household you run.
The short version
In Knoxville, AT&T Fiber is the strongest connection of the three wherever it's built: flat pricing, no data cap, uploads that match downloads, and speeds up to a gigabit. Xfinity is the most flexible, with the widest reach, three speed tiers, and the lowest introductory price, balanced by promotional pricing, a monthly data allowance, and much slower uploads. T-Mobile Home Internet is the simplest: one plan, one flat price backed by a multi-year guarantee, unlimited data, and no equipment fee, but its speed rises and falls with the 5G signal at your home and its top advertised speed is below either wired provider's gigabit plan. Choose AT&T if fiber reaches you, Xfinity if you want tier choice or the cheapest start, and T-Mobile if you value a fixed bill and easy setup more than peak speed.
Cheapest intro: Xfinity · Cheapest after promo: AT&T Fiber · Fastest download: Xfinity
Plans side by side
| Provider | Plan | Down / Up | Intro price | After promo | Contract | Data cap |
|---|---|---|---|---|---|---|
| Xfinity | Connect 300 | 300 / — Mbps | $45/mo | Not published | None | 1.2 TB |
| Xfinity | Fast 500 | 500 / — Mbps | $55/mo | Not published | None | 1.2 TB |
| Xfinity | Gigabit | 1000 / — Mbps | $75/mo | Not published | None | 1.2 TB |
| AT&T Fiber | Fiber 300 | 300 / 300 Mbps | $55/mo | $55/mo | None | Unlimited |
| AT&T Fiber | Fiber 500 | 500 / 500 Mbps | $65/mo | $65/mo | None | Unlimited |
| AT&T Fiber | Fiber 1 Gig | 1000 / 1000 Mbps | $80/mo | $80/mo | None | Unlimited |
| T-Mobile Home Internet | Rely Home Internet | 415 / — Mbps | $60/mo | $60/mo | None | Unlimited |
Prices as encoded on our provider pages, last reviewed 2026-09-25. "Not published" means the provider does not publish a standard post-promo rate — expect the promotional price to rise. Coverage shown is modeled; verify the providers available at your exact address before ordering.
Which should you choose?
Choose Xfinity if…
- It reaches the largest share of Knox County locations of the three, per FCC filings.
- Three speed tiers, from an entry plan up to a gigabit, let you match the plan to your household.
- Its entry plan carries the lowest advertised starting price of the three.
Choose AT&T Fiber if…
- Fiber uploads match downloads on every tier, the best option here for remote work and large uploads.
- Flat pricing, no annual contract, and no data cap.
- Its gigabit tier is faster than T-Mobile's top advertised speed.
Choose T-Mobile Home Internet if…
- One flat-priced plan with a multi-year price guarantee and unlimited data.
- No annual contract and no equipment fee, with service delivered over T-Mobile's 5G network rather than a cable or fiber line.
- FCC filings show it available at nearly as many Knox County locations as Xfinity's cable.
Three technologies, three kinds of trade-off
Fiber, cable, and 5G home internet solve the same problem in different ways. AT&T Fiber runs a fiber-optic line to the home, which is why its uploads match its downloads on every tier. Xfinity uses the cable network, which delivers fast downloads but much slower uploads. T-Mobile Home Internet has no line to the house at all; a receiver picks up T-Mobile's 5G signal, so setup is simple, but speed depends on signal strength and network congestion at your address.
Those differences explain the plan tables. AT&T and Xfinity both offer three tiers up to a gigabit. T-Mobile offers a single plan with a range of typical speeds rather than a fixed tier, and its top advertised speed sits below the wired gigabit plans. For households that mostly stream and browse, T-Mobile's range can be plenty; for households that need more consistent headroom, a wired plan is the safer choice.
Comparing the bills
Xfinity's entry plan has the lowest advertised price of the three, but Xfinity's prices are promotional and vary by market and term, and every Xfinity plan carries a monthly usage cap. AT&T Fiber's entry tier costs more, but the price is flat and data is unlimited. As advertised, T-Mobile's single plan costs more than both wired entry tiers and less than AT&T's mid tier, and T-Mobile pairs it with a multi-year price guarantee and unlimited data.
One detail matters for T-Mobile: its best price depends on AutoPay, and the lowest rate also requires a T-Mobile voice line. The advertised figure may assume those conditions, so without them expect to pay more, and confirm the terms before comparing it with the wired plans. Across all three, none requires an annual contract, so switching later carries no early-termination fee.
Frequently asked questions
- Is T-Mobile Home Internet as fast as cable in Knoxville?
- Sometimes, but not reliably. T-Mobile's speed depends on the 5G signal and network congestion at your address, and its top advertised speed is below the gigabit plans Xfinity and AT&T Fiber sell. For typical streaming and browsing it can be enough; for consistent high speed, a wired plan is safer.
- Do any Knoxville options come without a data limit?
- Two of the three do. AT&T Fiber and T-Mobile Home Internet both list unlimited data, while Xfinity attaches a usage allowance to each plan. For lighter use the allowance may never come into play; for a busy household it's one more reason to look at the other two.
- How widely available is AT&T Fiber in Knoxville?
- Less widely than its two rivals here. AT&T's fiber is reported at roughly half of Knox County locations, while Xfinity and T-Mobile each report close to nine in ten. If fiber hasn't reached your street, the realistic choice is between cable and 5G, and the section above on how those two differ is the place to start.
Bottom line
Both the numbers above and the trade-offs are only as useful as what's actually available at your address — start there, then pick the column that fits.
Dig deeper
All providers in Knoxville · Xfinity in Knoxville · AT&T Fiber in Knoxville · T-Mobile Home Internet in Knoxville · Check your address