AT&T’s Build-A-Plan Now Adds Home Internet Starting at $70

AT&T will fold home internet into its Build-A-Plan wireless service on July 7, 2026, turning a $15 modular phone plan into a single-bill package that also covers broadband. A combined wireless-plus-internet setup now starts at $70 a month, the company said in a press release, lifting Build-A-Plan from its May launch as an entry-level tier into a converged play that bundles mobile service with either AT&T Fiber 300 or the carrier’s 5G-powered Internet Air.

The headline change is the easy one to read. The less visible one sits in the small print. Build-A-Plan stays capped at one line per account, the base unlimited tier restricts video streaming to 480p standard definition, and an unlocked eSIM-capable phone is required. AT&T is pitching convergence to a narrow kind of customer: a single subscriber who wants one bill, not a family pooling lines for savings.

How the $70 Bundle Stacks Up

The starting price is fixed by three building blocks that the customer stacks on top of one another. The $15 base Build-A-Plan tier covers unlimited talk, text, and 1GB of data, per AT&T’s product page. From there, a $20 unlimited data add-on lifts the wireless side to unlimited mobile data, with video streams locked to standard definition. The third block is $35 for either AT&T Fiber 300, where the fiber footprint reaches, or AT&T Internet Air as a 5G-powered wireless alternative.

The $70 total, plus taxes and fees, requires an eligible wireless account plus AutoPay and paperless billing, per AT&T’s July Build-A-Plan expansion announcement. AT&T’s framing for the bundle borrows from the modular language it rolled out in May: each piece is a separately priced block the customer can switch on or off, and the same dial-up, dial-down logic that lets subscribers swap 5GB, 15GB, or unlimited wireless tiers each month now also covers the home internet slot.

Customers building the cheapest package will see the constraint in how the lines add up. Drop the unlimited add-on, and the bill drops with it. Pull the home internet block, and the bill drops further. Build-A-Plan is designed, AT&T said in the release, “to flex around how people actually live,” and the $70 starting price assumes the most common configuration rather than the cheapest possible one.

• $15/mo base: unlimited talk, text, and 1GB of data
• $20/mo unlimited data add-on: unlocks unlimited mobile data with SD streaming (480p)
• $35/mo Fiber 300 or Internet Air with eligible wireless and AutoPay

The One-Line Cap That Shapes the Audience

The most consequential detail in the bundle is the line cap. AT&T’s Build-A-Plan product page states it clearly: “Limit one line. Must bring unlocked, eSIM-capable phone.” That framing is the same one AT&T used in May, when it first launched Build-A-Plan as a modular wireless tier at $15 a month, and the limit has not loosened with the home internet upgrade.

The constraint shapes who the bundle is for. Build-A-Plan is pointed at individuals paying their own phone bill, often bringing a device they have already paid off, who want control over a single line from month to month. Households looking to stack lines under a shared account will need to look elsewhere in AT&T’s lineup, where group plans and trade-in deals remain the path to broader savings across multiple devices.

The phone requirement sharpens the picture. Build-A-Plan customers have to bring their own device, and it has to be eSIM-capable and unlocked. AT&T’s product page directs customers who want to buy a new phone or attach tablets, watches, or other gear to “try our best unlimited plans” instead. The bundle is, in other words, a single-line BYOD product that does not subsidize a new device and does not extend to a household full of them.

The data trade-off sits inside the same cap. The unlimited data add-on costs $20 a month on top of the $15 base, and AT&T’s plan-builder notes that “AT&T may temporarily slow data speeds if the network is busy.” Build-A-Plan subscribers can stack extra data and hotspot allocations on top of the base tier:

• Wireless data: 5GB, 15GB, or unlimited, from $5/mo each
• Hotspot data: 5GB, 25GB, or 50GB, from $5/mo each
• Off-cycle add-on: 5GB extra, valid for 5 days, for $8

When Fiber Stops, Internet Air Picks Up

The home internet slot in Build-A-Plan is split between two products that deliver the same $35 price point but work very differently. AT&T Fiber 300 is a fiber-to-the-home wired service with symmetric upload and download speeds, drawn from the network AT&T calls “the nation’s largest.” Where fiber does not reach, the same $35 slot covers AT&T Internet Air, a 5G-powered wireless home internet service that rides AT&T’s mobile network.

Internet Air is the coverage cushion for the bundle. AT&T’s release frames the 5G option as the way to “stay connected anywhere they are,” and the same parcel of monthly price covers either product. For subscribers in markets where AT&T Fiber 300 is fully built out, fiber is the default. For markets still waiting on fiber build, Internet Air slots in without raising the bill.

The wireless fallback comes with a known caveat. AT&T’s own fine print for Internet Air, carried into the bundle, notes that “in rare cases, if your usage is contributing to congestion on the network, AT&T will greatly reduce your speed for a min. of 30 min.” That threshold wording has been on AT&T’s Internet Air service generally. The home internet slot in Build-A-Plan is a connection, not a fiber substitute, with different speeds and different network behavior under load even at the same $35 mark.

From the May $15 Wireless Start to the July Converged Move

Build-A-Plan was not pitched as a wireless-only product when AT&T first unveiled it in late May. The launch announcement framed the modular plan as “more choice, more control, more value”: a phone line that could shrink or grow each month to fit the subscriber’s budget and connectivity needs that month.

The pricing aligned with that framing. The May launch priced the entry wireless tier at $15 a month and positioned it as “the lowest entry price compared to T-Mobile and Verizon,” a comparison Jenifer Robertson drew in her launch statement. The carrier backed the comparison by pointing subscribers at “America’s largest wireless network.”

The July 7 update is the second step. It adds home internet to the modular chassis on which the May launch was built, and it does so without disturbing the modular logic the carrier set out in May. Each block is still a separately priced add-on the customer can switch on or off. The build-once, pay-monthly framework that defined the May launch now has a home internet leg to stand on, and the $70 starting price assumes subscribers add the most common blocks.

Cost, Control, and the SD-Video Trade-Off

The growth of Build-A-Plan depends on how a single-line customer weighs the convenience of one bill against the trade-offs the bundle forces. The unlimited data add-on costs $20 a month on its own, which on its own lines up with several standalone unlimited phone plans sold by competitors and AT&T’s own lineup. The value equation only flips when the $35 home internet block on Fiber 300 or Internet Air is stacked toward the $70 mark.

The other lever is the 480p ceiling. The base unlimited tier locks streaming video at standard definition, which on a 5G phone or a home TV looks closer to a DVD than to the high-bitrate feeds most US subscribers are used to. AT&T’s full unlimited family plans move the streaming ceiling higher, and the trade-off between Build-A-Plan and those plans is the closer question for a customer who only needs one line but cares about video quality.

Customers told us they want connectivity that works together seamlessly and the flexibility to choose what fits their lives. With Build-A-Plan, we’ve already put customers in control of their wireless experience. Now, by making it easier for them to add AT&T Fiber or AT&T Internet Air, we’re giving them even more opportunity to stay connected.

That is Jenifer Robertson, executive vice president and general manager, AT&T Consumer, in the Build-A-Plan expansion press release. The statement underscores AT&T’s claim that “more than half of customers now want the choice to personalize their wireless and have the ability to add broadband,” a figure the carrier tied to its own research from December 2025 through January 2026.

What Build-A-Plan gives up to keep the modular frame is shared-account savings and high-tier streaming perks. What it offers in return is a single line that can be tuned month by month, a home internet line that can be added or removed, and one bill for both. For the right single-line subscriber, that is the trade-off worth $70 a month; for a family shopping for shared savings, it is not.

The Convergence Pattern Behind the Modular Frame

Build-A-Plan is the latest expression of an older convergence play at AT&T. The press release for the July update frames the move as a continuation: “We were first to offer a single subscription for wireless and home internet at one clear, all-included monthly price when we launched AT&T OneConnect.” OneConnect was the earlier converged offering; Build-A-Plan is the modular, BYOD successor the carrier is positioning for a different buyer.

The audience AT&T has in mind is set by a figure the carrier itself discloses. The release ties Build-A-Plan’s modular bundle to research from “Build-A-Plan Concept Research, AT&T Brand Strategy, Dec 2025 – Jan 2026 (n=6,008 US wireless Consumers),” a study the carrier cites to back the claim that more than half of customers now want the choice to personalize their wireless and add broadband. With Build-A-Plan folded into the modular chassis, AT&T is putting a single product on the table for that customer.

The company AT&T serves is large. AT&T “help[s] more than 100 million U.S. families, friends and neighbors, plus nearly 2.5 million businesses, connect to greater possibility,” per the company’s own About copy. The modular bundle is one small piece of that base. The question AT&T is now betting on is whether the same modular frame that worked for entry-level wireless will work for converged home internet.

Frequently Asked Questions

What does Build-A-Plan cost with home internet?

Per the AT&T release, the combined package starts at $70 a month before taxes and fees, built from the $15 base Build-A-Plan tier, a $20 unlimited data add-on, and $35 for AT&T Fiber 300 or AT&T Internet Air. The $70 rate requires an eligible wireless account with AutoPay plus paperless billing turned on.

What phone do I need?

Build-A-Plan is for a single line and requires an unlocked, eSIM-capable phone that the customer already owns, per the AT&T Build-A-Plan page. The plan does not pair with new device financing on the same account.

What is the difference between AT&T Fiber 300 and AT&T Internet Air?

AT&T Fiber 300 is a fiber-to-the-home wired service with symmetric upload and download speeds, available where AT&T’s fiber footprint reaches. AT&T Internet Air is a wireless home internet service delivered over AT&T’s 5G mobile network, and it is the default in areas without fiber.

Does the unlimited tier stream in HD?

The base unlimited data add-on locks video streaming to 480p standard definition, per AT&T. Higher resolution video needs a premium data tier that AT&T sells separately from Build-A-Plan.

When does the home internet option go live?

AT&T said the updated Build-A-Plan with home internet goes live on Tuesday, July 7, 2026, and the company’s release is dated to that launch day.