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T-Mobile US (TMUS): analysis traps
Where its figures could mislead a reader, and what to check before taking them at face value · Data: Q3 2026, to Sep 30, 2026, filed Oct 28, 2026; rules v1.1
T-Mobile US (TMUS): 1 rule of 10 triggered on the filings to Sep 30, 2026: FCF growth = the business improved. 2 to review; 2 with insufficient data; 2 not applicable. Each is a question to verify, with the normal explanation that would produce the same figures.
Check these first
FCF growth = the business improved Triggered · severity medium · confidence high
Free cash flow rose $4.5B (+34%), from $13.5B to $18.0B, but working capital released $3.9B more cash than the year before: 87% of the increase came from sources that need not repeat. Operating cash flow before working capital rose by $1.7B.
Innocent reading: An expansion programme finished, so capex fell back to maintenance levels for good.
Low P/E at a cyclical peak = undervalued To review · confidence medium
Net income of $11.3B is at a high against a median of $3.5B over eight years; at 15.4× the market is not pricing it as cheap, but a multiple on this year's profit still understates the mid-cycle one (50.1×).
A precise DCF value = the true value To review · confidence high
The DCF's point value is 280.42 a share (price 162.01); 75% of it is the terminal value, a number about years no one has seen. Moving wacc by ±1 pt alone takes it from 212.96 to 393.08; across every method the research ran the range is -194 to 1,048. The value is a range; the decimals are not information.
Innocent reading: A stable, mature business with a narrow range of outcomes, where the point value is a fair summary.
Every rule
A01 FCF growth = the business improved Triggered severity medium · confidence high
Free cash flow rose $4.5B (+34%), from $13.5B to $18.0B, but working capital released $3.9B more cash than the year before: 87% of the increase came from sources that need not repeat. Operating cash flow before working capital rose by $1.7B.
The figures and how they are read
| Fiscal year before | FY2024 |
| Fiscal year | FY2025 |
| Operating cash flow, year before | $22.3B |
| Operating cash flow | $27.9B |
| Capex, year before | $8.8B |
| Capex | $10.0B |
| Free cash flow, year before | $13.5B |
| Free cash flow | $18.0B |
| Change in FCF | $4.5B |
| Change in capex | $1.1B |
| Working capital: change in its cash contribution | $3.9B |
| Of which: capex cut | 0.00 |
| Of which: working capital released | $3.9B |
| Share of the increase that need not repeat | +86.9% |
| Operating cash flow before working capital: change | 1712000000.00 |
FCF = operating cash flow − cash capex; ΔFCF = ΔOCF − ΔCapEx; the working-capital part is the change in the cash-bridge items (receivables, inventory, payables, accruals), with the sign of the cash flow statement
Source: FY2025 (cash flow statement, fiscal year) · FY2024 (cash flow statement, fiscal year before)
What would explain it innocently
- An expansion programme finished, so capex fell back to maintenance levels for good
- Suppliers agreed longer payment terms in a contract
- Inventory was brought down after a glut and will stay down
What to look for in the filing
- Maintenance capex (what it costs to keep the assets working)
- Supplier payment terms and any supply-chain financing
- Management's capex guidance for next year
What would show the trap does not apply
- Next year's FCF holds or rises with capex back at its earlier level and working capital no longer releasing cash
- The 10-K's capex guidance and the segment capex show the cut is a completed programme, not deferral
- The working-capital release matches a disclosed change in terms or a divestiture, not stretched payables or a collection push
Look again: next filing.
A07 Stock compensation added back = no economic cost Not triggered confidence high
Stock compensation is 0.9% of revenue: small enough that adding it back changes little.
The figures and how they are read
| Fiscal year | FY2025 |
| Stock compensation | $829M |
| Revenue | $88.3B |
| SBC / revenue | +0.9% |
| Buybacks | $10.0B |
| Buybacks / SBC | 12.0 |
| Diluted shares, year before | 1,173.2M shares |
| Diluted shares | 1,131.1M shares |
| Diluted shares: change | -3.6% |
SBC / revenue from the cash flow statement's add-back; the diluted weighted share count year over year; buybacks from the financing section
Source: FY2025 (stock compensation, buybacks and the diluted share count, fiscal year)
B02 Receivables growing = future cash is certain Not triggered confidence medium
Receivables grew -1% against revenue 7% in Q3 2026; DSO 20 against a median of 19: collections are keeping pace with sales.
The figures and how they are read
| Quarter | Q3 2026 |
| Revenue, year over year | +7.4% |
| Receivables, year over year | -1.4% |
| Quarter before | Q2 2026 |
| Revenue y/y, quarter before | +7.8% |
| Receivables y/y, quarter before | +14.1% |
| Days sales outstanding | 20.0 |
| DSO, median of eight quarters | 19.0 |
| Receivables | $5.0B |
| Revenue | $23.6B |
receivables and revenue against the same quarter a year earlier; DSO = receivables / quarterly revenue × days, against the median of the eight quarters before
Source: Q3 2026 (receivables and revenue) · Q3 2025 (the same quarter a year earlier)
B08 Adjusted profit = economic profit Insufficient data
no reconciliation table read from the releases yet and fewer than three quarters with both an adjusted and a GAAP EPS
C02 Low net debt = no refinancing risk Insufficient data
neither a maturity table nor the current portion of debt is on file
D03 EPS growth = profit growth Not triggered confidence high
EPS rose 34% and net income rose 27% in Q3 2026; the share count fell 4.9%: EPS growth follows profit growth.
The figures and how they are read
| Quarter | Q3 2026 |
| Quarter before | Q3 2025 |
| EPS, year before | $2.41 |
| EPS | $3.22 |
| Net income, year before | $2.7B |
| Net income | $3.5B |
| Diluted shares, year before | 1,126.6M shares |
| Diluted shares | 1,071.6M shares |
| EPS growth | +33.8% |
| Net income growth | +27.3% |
| Diluted shares: change | -4.9% |
| eps from profit | $0.66 |
| eps from share count | $0.16 |
EPS and net income against the same quarter a year earlier; the EPS bridge attributes the change to profit first, then to the share count (the order is fixed and disclosed)
Source: Q3 2026 (net income, diluted shares, EPS) · Q3 2025 (the same quarter a year earlier)
E02 Low P/E at a cyclical peak = undervalued To review confidence medium
Net income of $11.3B is at a high against a median of $3.5B over eight years; at 15.4× the market is not pricing it as cheap, but a multiple on this year's profit still understates the mid-cycle one (50.1×).
The figures and how they are read
| market value | $173.6B |
| net income ttm | $11.3B |
| pe ttm | 15.40 |
| net income median fy | $3.5B |
| pe mid cycle | 50.10 |
| net income peak fy | $11.3B |
| years | FY2018 / 2888.0; FY2019 / 3468.0; FY2020 / 3064.0; FY2021 / 3024.0; FY2022 / 2590.0; FY2023 / 8317.0; FY2024 / 11339.0; FY2025 / 10992.0 |
| down years in window | 4 |
P/E on the trailing twelve months' net income against the P/E on the median net income of the last eight fiscal years (a mid-cycle stand-in); 'at a peak' = this year's profit at or above 90% of the best year and at least 1.3× the median
Source: Q3 2026 (net income, trailing twelve months)
What would show the trap does not apply
- Profit holds at this level through the next two years (the eight-year peak was a new base, not a top)
- The industry's capacity and prices stay where they are rather than reverting
Look again: next filing.
E07 A precise DCF value = the true value To review confidence high
The DCF's point value is 280.42 a share (price 162.01); 75% of it is the terminal value, a number about years no one has seen. Moving wacc by ±1 pt alone takes it from 212.96 to 393.08; across every method the research ran the range is -194 to 1,048. The value is a range; the decimals are not information.
The figures and how they are read
| dcf value | 280.42 |
| price | 162.01 |
| terminal value share | +75.3% |
| swing by input | WACC / ±1 pt / 212.96 / 393.08; Revenue growth (each year) / ±5 pts / 212.32 / 361.71; Operating margin / ±3 pts / 230.58 / 330.26; Tax rate / ±5 pts / 257.88 / 302.95 |
| range all methods | -193.87; 1048.13 |
the DCF's point value against the share of it that is the terminal value and the value at each input moved by one step (growth ±5 pts, WACC ±1 pt, margin ±3 pts …); the range across every method the research ran
Source: 2026-11-08 (valuation research)
What would explain it innocently
- A stable, mature business with a narrow range of outcomes, where the point value is a fair summary
- The inputs that matter most are themselves well known (a regulated return, a long contract)
What to look for in the filing
- Which input you believe differs from the research's and why
- What the price implies for growth (the reverse DCF on the fair-value page)
What would show the trap does not apply
- The DCF's value is robust to the terminal growth and discount rate (the range's low end is still above the price)
- The company's cash flows over the next three years track the DCF's early years
Look again: next filing.
J06 A bank's low P/E and high profit = safe Not applicable
not a bank
J08 A REIT's low net income = the dividend is unsafe Not applicable
not a REIT
What the statuses mean
Triggered: the filings show the pattern; read the normal explanations and the missing evidence before concluding anything. To review: one quarter or a weak signal; a reader's judgement, not a pattern. Not triggered: the pattern is absent on these figures. Insufficient data: the filings read so far do not hold what the rule needs; this is not a clean bill. Not applicable: the rule is not meant for this kind of company (a bank's working capital, a loss-making quarter's EPS growth). Out of date: the latest filing is more than fifteen months old.
Severity is what the pattern could mean for cash, value or solvency; confidence is how reliable the inputs and the reading are. The two are kept apart.
Record a view
A reader's judgement, grounds, what would change it and the next review; kept in the browser (needs JavaScript).
Every rule and the companies it triggers on → T-Mobile US: cash flow → Earnings quality score →
Each rule reads the company's own filings by a fixed formula and says what would explain the same figures innocently. A triggered rule is a question to verify, not a finding of manipulation, and not a view on the stock. Missing data is shown as missing, never as clear. Not investment advice.