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T-Mobile US operates a wireless network that consumers and businesses use for calls, messaging and internet access. Nearly all its revenue comes from the United States. Service charges supply most revenue, with customers billed after using service contributing the largest share, especially mobile phone users. Prepaid customers pay in advance through T-Mobile, Metro by T-Mobile, Mint Mobile and Ultra Mobile. The company also sells phones and other devices, including on installment plans, and charges wholesale partners to use its network for services they resell.
For home broadband, T-Mobile uses spare capacity on its nationwide 5G network to connect customers through a wireless gateway. It also sells fiber broadband under its own brand: the Lumos and Metronet joint ventures build and operate the networks, while T-Mobile manages the customer relationships and pays the ventures for network access.
The business depends on attracting and retaining customers through network coverage, capacity, reliability and pricing. Maintaining and expanding the network requires ongoing spending on equipment and radio spectrum. FCC licenses and rules determine how T-Mobile can use that spectrum; if a license is revoked or not renewed, it cannot provide service under that license.
The risk section is the longest, dullest part of the filing. This keeps only what can really hurt you: where it hits, how hard, when it plays out.
Every company claims an edge. Each one is checked against hard numbers like margins and returns: which hold, and which line gives way first.
Verizon competes with T-Mobile nationwide for consumers and businesses paying for wireless service and fixed-wireless broadband. Watch Verizon’s pricing and customer retention for signs of pressure on T-Mobile’s subscriber growth.
AT&T competes with T-Mobile for U.S. consumers and businesses buying postpaid or prepaid wireless plans and broadband. Its phone promotions for customers starting, renewing or upgrading postpaid service show what T-Mobile faces in winning and keeping those customers.
Charter’s Spectrum Internet and mobile bundles compete for the household spending that supports T-Mobile’s wireless and growing home broadband business. Charter earns monthly subscription fees; watch its bundle pricing and customer retention as a test of that competitive pressure.
Comcast competes with T-Mobile for broadband and mobile customers, but also leases it 600 MHz spectrum and plans to pay for T-Mobile network access for business wireless starting in 2026. Watch that business-wireless rollout: a retail rival is also becoming a wholesale customer.
T-Mobile pays Crown Castle for tower space essential to its wireless network, so its network decisions reach Crown Castle’s rental business. Crown Castle has reported more lease non-renewals from T-Mobile’s Sprint network consolidation; watch those non-renewals for evidence of which sites T-Mobile no longer needs.
SBA Communications depends heavily on T-Mobile’s payments for antenna space on towers and other sites: T-Mobile generated 31.1% of its total revenue in 2025. SBA’s site-leasing results offer a view of the rental spending behind T-Mobile’s wireless network.
American Tower supplies communications-site space that T-Mobile pays to use, with T-Mobile accounting for 18% of its total revenue in 2025. Its long-term leases and periodic rent increases make site-rental terms worth watching as part of T-Mobile’s network costs.
Apple supplies the iPhones that T-Mobile sells to customers and lets them pay for in installments. Apple’s handset launches and pricing matter for T-Mobile’s upgrade promotions and equipment costs.
EchoStar competes with T-Mobile for wireless subscribers while paying to use its mobile network to serve its own customers. T-Mobile expects lower wholesale revenue from EchoStar in 2026, making that revenue stream the thing to watch rather than treating EchoStar only as a rival.
SpaceX supplies satellite-to-mobile connectivity to T-Mobile for operator-paid fees, while its Starlink broadband competes for T-Mobile’s home internet customers. Watch its mobile connectivity offerings and fees for the supplier side of the tie, and Starlink’s broadband offering for the competitive side.
Array Digital Infrastructure leases tower space to T-Mobile, and its remaining infrastructure business depends on which sites T-Mobile keeps after buying its wireless operations. Watch potential tower-decommissioning costs, including remaining ground-lease obligations, for signs of sites T-Mobile will not permanently use.
Optimum Communications competes with T-Mobile for residential and business broadband and mobile customers, but also pays for T-Mobile network access to deliver its own mobile service. Its mobile business therefore matters both as retail competition and as demand for T-Mobile’s wholesale network service.
Inseego supplies mobile hotspots and fixed-wireless broadband devices sold by T-Mobile; T-Mobile and Verizon together accounted for approximately 89% of Inseego’s total revenue in 2025. Watch its Mobile Solutions and Fixed Wireless Access Solutions revenue for device demand, but do not read the combined customer share as T-Mobile alone.
AT&T Inc. earningsT
AT&T’s report will show how hard carriers are promoting to win and keep postpaid customers, the same customers T-Mobile competes for.
Read AT&T’s postpaid retention alongside its phone promotions. Weaker retention and richer offers would suggest carriers need to spend more to keep customers, potentially weighing on device economics; steady retention without heavier promotions would point to less pressure on T-Mobile, but would not prove that T-Mobile won those customers.
Crown Castle Inc. earningsCCI
Crown Castle’s report will show whether T-Mobile is still declining to renew tower-site leases as it consolidates the Sprint network.
Watch Crown Castle’s lease non-renewals and how many it links to T-Mobile. More T-Mobile-related non-renewals would indicate that T-Mobile may no longer need some sites and could reduce those rental costs; fewer would offer less evidence of site exits, but would not show that all network sites or costs are unchanged.
American Tower Corporation earningsAMT
American Tower’s site-rental results offer a view of the leasing costs behind T-Mobile’s network; T-Mobile accounted for 18% of American Tower’s 2025 revenue.
Look at American Tower’s rental revenue and whether lease renewals or rent increases are driving growth. These figures cover its overall site business, not T-Mobile’s individual bills. Rental growth driven by higher rents would point to potential pressure on T-Mobile’s network costs; slower rent growth would offer less evidence of that pressure, while T-Mobile’s own lease terms determine the actual effect.
T-Mobile US, Inc. earningsThis company
Postpaid customers drive most of T-Mobile’s service revenue, and this report will show whether growth in accounts and revenue per account is translating into more operating profit.
Read postpaid service revenue alongside operating expenses, and check whether both average accounts and revenue per account are growing. If both rise without expenses absorbing the added revenue, customer growth is turning into profit; if account growth does the work while revenue per account weakens, or expenses grow faster than revenue, the profit gains are less secure.
Fed Interest Rate Decision
T-Mobile’s policy-rate environment affects what it pays to borrow and refinance its substantial debt, flowing through to net interest expense.
Expected4.0%Last release4.0%
If it comes in above expectations
If the policy rate is higher than expected, debt that reprices and new borrowing may cost more, increasing T-Mobile’s interest expense; the effect depends on its financing needs and debt terms.
If it comes in below expectations
If the policy rate is lower than expected, debt that reprices and new borrowing may cost less, easing T-Mobile’s interest expense; the effect depends on its financing needs and debt terms.
Apple Inc. earningsAAPL
Apple’s iPhone launches and pricing shape the phones T-Mobile sells and the promotions it uses to encourage upgrades, affecting equipment revenue and costs.
Read Apple’s handset demand and pricing against T-Mobile’s device sales and promotion costs. Strong demand without pricing that forces heavier discounts could help T-Mobile sell more devices or improve revenue per device after promotions; weaker demand or higher prices that bring richer offers could pressure equipment revenue and leave less after discounts. Apple’s overall sales are not the same as T-Mobile’s iPhone sales.
EchoStar Corporation earningsECHO
EchoStar competes with T-Mobile for wireless customers while paying to use its network, so its report offers a window into demand for T-Mobile’s wholesale service.
Separate EchoStar’s wireless performance from its use of T-Mobile’s network. If its wireless business and network use hold up, that supports T-Mobile’s wholesale revenue stream; if business, usage or payments weaken, that revenue is more likely to fall. T-Mobile expects lower wholesale revenue from EchoStar in 2026, so watch whether EchoStar’s report points to more or less pressure. EchoStar’s growth may also mean stronger retail competition with T-Mobile.
Charter Comm Inc Del earningsCHTR
Charter’s bundle pricing and customer retention show how strongly it competes for the broadband customers T-Mobile is also trying to win.
Read Charter’s bundle pricing alongside broadband customer retention. Compelling bundles with strong retention would show that Charter is keeping households on its network, making it harder for T-Mobile to win home-broadband customers; weaker bundles or retention would suggest less pressure, but would not prove that households switch to T-Mobile.
