Xfinity vs T-Mobile Home Internet is a choice between a wired cable line and a 5G gateway. Both now lock their base price for five years.[1][2] Xfinity can deliver far higher uploads on upgraded parts of its network; T-Mobile wins on simple self-setup with no line to install.[3] Where T-Mobile Fiber exists, the comparison changes.
T-Mobile sells 5G home internet only at addresses where it decides the network can support it, and Xfinity is not offered everywhere either.[2][1] Start with an area shortlist, then let each provider check your exact address.
Where the two overlap
Our FCC data (filings as of December 30, 2025) lists both Xfinity and T-Mobile in a long list of places, including Chicago, Houston, Philadelphia, Jacksonville, San Francisco, Indianapolis, Seattle, Nashville, Denver and Washington, DC.[4] Because T-Mobile's 5G service depends on local network capacity, a city listing does not mean your street qualifies.[2]
Five-year prices side by side
Both providers advertise a five-year lock on the base monthly rate. These are the prices each showed on October 20, 2026, before taxes and fees:[1][2]
| Plan level | Xfinity (new customers) | T-Mobile 5G Home Internet |
|---|---|---|
| Entry | 300 Mbps, $45/mo | Rely, $50/mo ($35 with a voice line) |
| Middle | 500 Mbps, $60/mo | Amplified, $60/mo ($45 with a voice line) |
| Top | 1 Gig $70/mo; 1.2 Gig $100/mo | All-In, $70/mo ($55 with a voice line) |
The conditions differ. Xfinity's prices include a $10 discount for autopay from a stored bank account plus paperless billing.[1] T-Mobile's prices require AutoPay, and it lists a $35 device connection charge at sale.[2] Xfinity says its lock follows you if you move within its service area.[1] T-Mobile's lock excludes taxes, fees and network management practices.[2]
Both include equipment and unlimited data, and neither requires an annual contract.[1][2] If you already pay T-Mobile for a phone line, its voice-line pricing can make the 5G plans cheaper than Xfinity's entry price.[2]
The upload test: what Xfinity network type do you have?
Download speed gets the headlines, but upload decides how well video calls and cloud backups work. Here Xfinity's answer depends on which version of its network serves your home. Comcast publishes upload tiers for each network type:[3]
| Connection | Upload on common tiers | Notes |
|---|---|---|
| Xfinity cable, sub-split | 20 Mbps (35 Mbps on 1.2 Gig) | Older cable configuration |
| Xfinity cable, mid-split | 100 Mbps (200 Mbps on 1.2 and 2 Gig) | Upgraded cable |
| Xfinity Full Duplex | Same as download, 300 Mbps to 2 Gig | Symmetrical cable |
| T-Mobile 5G Home | Typically 12–55 Mbps | Varies with signal and congestion[2] |
So at a home still on sub-split cable, T-Mobile's typical upload range can overlap Xfinity's.[3][2] At a mid-split or Full Duplex home, Xfinity's upload is far higher. Ask Xfinity which upload speed your address gets on the plan you are considering; the answer is more useful than the download number.
T-Mobile lists typical downloads of 170–498 Mbps on Amplified and All-In and 170–354 Mbps on Rely, with a quarter of customers below those ranges.[2] That is enough for many homes, but it is a range, not a set tier.
Busy-hour behavior
T-Mobile says home internet customers may see lower speeds than other customers during congestion, with further reductions for those using more than 1.2TB a month.[2] That is the main practical trade-off of fixed wireless. Xfinity's plans include unlimited data with no monthly cap listed.[1]
If your household's heaviest use falls in the evening, test T-Mobile at that time before relying on it. For gaming households, our T-Mobile Home Internet gaming guide covers latency questions.
T-Mobile Fiber vs Xfinity
T-Mobile also sells fiber in select locations, which is a different product from its 5G service.[5] As of October 20, 2026, it listed Fiber 300 at $35, Fiber 1 Gig at $50 and Fiber 2 Gig at $70 a month with Fiber AutoPay, or $10 more without, plus taxes and fees.[5] T-Mobile says Fiber has equal upload and download speeds, unlimited data, and includes the router and installation.[5]
Against Xfinity, T-Mobile Fiber is a closer match than 5G: both are wired, and its symmetrical upload beats Xfinity's sub-split and mid-split tiers.[5][3] It is only an option where T-Mobile has built fiber, so check its fiber availability separately from the 5G checker.
A 15-day trial plan
T-Mobile offers a 15-day test drive on its 5G plans.[2] Use it deliberately:
- Set up the gateway where your devices are used most.
- Test speeds morning, evening and late night.
- Record upload speeds during your household's busiest hour.
- Run a real video call while someone streams.
- Keep Xfinity active until the trial results are acceptable.
Our verdict
Choose Xfinity if your address has mid-split or Full Duplex cable and you need strong uploads, or if heavy evening use makes busy-hour priority a concern. Choose T-Mobile 5G Home Internet if you want self-setup, already have a T-Mobile voice line, and its trial performs well at your busiest hour. If T-Mobile Fiber is offered at your address, compare it with Xfinity first.
Want the bigger picture? See fiber vs cable vs 5G home internet, or our Xfinity internet-only guide if you are skipping bundles. The call line below is for comparing plans before you buy, not support for an existing account.
Frequently asked questions
Is T-Mobile Home Internet faster than Xfinity?
Not usually on upload. T-Mobile lists typical uploads of 12–55 Mbps, while Xfinity's upload depends on your network type.[2][3]
Do both have data caps?
Neither lists a monthly cap, but T-Mobile may lower priority during congestion, especially above 1.2TB a month.[2][1]
Is T-Mobile Fiber the same as T-Mobile Home Internet?
No. T-Mobile Fiber is a wired service in select locations; T-Mobile Home Internet uses its 5G network.[5][2]
Sources
- Xfinity Internet service plans. Xfinity, Internet service plans, accessed October 20, 2026. New-customer five-year prices, discount conditions, included equipment and contract terms. ↩
- T-Mobile 5G Home Internet Plans. T-Mobile, 5G Home Internet Plans, accessed October 20, 2026. Plan prices, price lock terms, typical speeds, congestion management, device charge and test drive. ↩
- Comcast Network Management Information. Comcast, Network Management Information, accessed October 20, 2026. Upload tiers by network type and fiber service. ↩
- FCC National Broadband Map, Broadband Data Collection. FCC Broadband Data Collection, D25 filing as of December 30, 2025, via our place-level provider data, accessed October 20, 2026. Area-level listings, not address eligibility. ↩
- T-Mobile Fiber. T-Mobile, T-Mobile Fiber, accessed October 20, 2026. Fiber prices, AutoPay condition, included equipment and installation. ↩
Written with AI assistance and checked against the sources listed; our data from FCC/Census as dated. FCC data as of December 30, 2025; Census ACS 5-year 2020-2024. Editorial policy