T-Mobile has launched a 5 gigabit fiber broadband service priced at $90 a month, available from today, and says customers who sign up now will have that price guaranteed for a decade. The plan is the fastest in a four-tier fiber line-up the company now offers for home broadband.
The new Fiber 5 GIG tier sits above Fiber 300 MBPS at $35 a month, Fiber 1 GIG at $55 and Fiber 2 GIG at $70. All of the pricing is based on choosing autopay billing and excludes taxes and fees.
For a limited time, T-Mobile says customers can also receive bill credits equivalent to two months free and $300 in virtual prepaid cards, provided they do not cancel within the first year.
The company says its fastest ever service is aimed at the most demanding households, with enough bandwidth for more people and devices to be online at the same time, whether for gaming, working or a growing number of smart home devices. T-Mobile says the service runs on a 100% fiber-optic connection directly to the home, giving customers symmetrical speeds so that uploads are as fast as downloads, which it says matters for video calls, security cameras and cloud backups.
"Between online gaming, smart devices and AI-powered tools, there's more happening online in our households than ever," said chief commercial officer Andre Almeida. "Our fastest 5 Gig plan gives customers incredible capacity for everything they're doing today, with room to grow for whatever comes next."
The price guarantee carries conditions. Taxes and fees, voluntary equipment or speed upgrades, select limited-time promotions, per-use charges, third-party services and network management practices are not included. The most obvious caveat is that broadband speeds are expected to keep rising, and a customer who chooses to upgrade to a faster service later gives up the price guarantee. Availability can be checked on the company's website.
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Monthly price of T-Mobile Fiber home broadband plans
US$ per month
Prices with autopay billing; excludes taxes and fees. Source: T-Mobile
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Analysis
Why This Matters
A decade-long price lock is a striking offer in a market where introductory broadband pricing typically expires after a year or two, and it puts pressure on rival providers to match on price certainty rather than raw speed alone.
The 5 gigabit tier is pitched above what most households currently use, so its real audience is small today; the plan is as much a marketing flag as a product.
The guarantee only holds while a customer stays on the same plan, so upgrades, equipment changes and promotional add-ons are the points where the promise can lapse.
Background
Home broadband in the United States has traditionally been sold by cable and telephone companies, with fibre-to-the-home providers competing on symmetrical upload and download speeds that cable networks struggle to match. T-Mobile, long known as a mobile carrier, has expanded into fixed home internet and fibre in recent years as part of a broader push beyond wireless subscriptions. Speed tiers across the industry have climbed steadily, which is why the terms attached to any long price guarantee matter as much as the headline rate.
What to Watch
Whether the 10-year guarantee survives upgrades: customers who move to a faster tier later lose it, so take-up of the 5 Gig plan versus the cheaper tiers will show how much the lock is worth to buyers.
The promotional credits, which depend on staying a customer for a full year, and how quickly the limited-time offer is withdrawn.
How competing fibre and cable providers respond on price certainty, given the plan undercuts the usual short promotional cycle.
Key Perspectives
Andre Almeida, T-Mobile chief commercial officer: says households now have more happening online than ever, citing online gaming, smart devices and AI-powered tools, and that the 5 Gig plan offers capacity for current use with room to grow.
12 claims in this story checked against 1 source: 12 supported.
Show each claim
SupportedT-Mobile launched a 5-gigabit fiber broadband service.9to5Mac: “T-Mobile has announced a new 5 gigabit fiber broadband service priced at $90 a month, starting today.”
SupportedThe 5-gigabit plan costs $90 a month.9to5Mac: “T-Mobile has announced a new 5 gigabit fiber broadband service priced at $90 a month, starting today.”
SupportedCustomers who sign up now are guaranteed that price for a decade.9to5Mac: “The company also says that if you sign up now, the price is guaranteed not to increase for a full decade”
SupportedFiber 5 GIG is the fastest of the four home broadband plans T-Mobile offers.9to5Mac: “The company now offers a total of 4 different home broadband plans with fiber connections: Fiber 300 MBPS: $35/month Fiber 1 GIG: $55/month Fiber 2 GIG: $70/month Fiber 5 GIG: $90/month”
SupportedThe service is available starting today.9to5Mac: “T-Mobile has announced a new 5 gigabit fiber broadband service priced at $90 a month, starting today.”
SupportedThe four fiber tiers are priced at $35 for Fiber 300 MBPS, $55 for Fiber 1 GIG, $70 for Fiber 2 GIG and $90 for Fiber 5 GIG per month.9to5Mac: “Fiber 300 MBPS: $35/month Fiber 1 GIG: $55/month Fiber 2 GIG: $70/month Fiber 5 GIG: $90/month”
SupportedThe listed prices require autopay and exclude taxes and fees.9to5Mac: “All pricing is based on choosing autopay billing and without taxes and fees.”
SupportedFor a limited time, customers can get bill credits equivalent to two months free and $300 in virtual prepaid cards if they do not cancel within the first year.9to5Mac: “The company says that for a limited time you can also get bill credits equivalent to two months free, and $300 in virtual prepaid cards provided you don’t cancel within the first year.”
SupportedChief commercial officer Andre Almeida made the two quoted remarks about online activity and the 5 Gig plan’s capacity.9to5Mac: ““Between online gaming, smart devices and AI-powered tools, there’s more happening online in our households than ever,” said chief commercial officer Andre Almeida. “Our fastest 5 Gig plan gives customers incredible capacity for everything they’re doing today, with room to grow for whatever comes next.””
SupportedThe service uses a 100% fiber-optic connection directly to the home and provides symmetrical upload and download speeds.9to5Mac: “And because T‑Mobile Fiber runs on a 100% fiber-optic connection directly to the home, customers get fast, consistent performance with symmetrical speeds, meaning uploads are just as fast as downloads.”
SupportedThe price guarantee excludes taxes and fees, voluntary equipment or speed upgrades, select limited-time promotions, per-use charges, third-party services and network management practices.9to5Mac: “Taxes & fees, voluntary equipment or speed upgrades, select limited-time promotions, per-use charges, third-party services, and network management practices aren’t included.”
SupportedUpgrading to a faster service later eliminates the price guarantee.9to5Mac: “The most obvious potential gotcha is that broadband speeds will continue to increase over the years, and choosing to upgrade to a faster service at a later date eliminates the price guarantee.”