AI-generated analysis, not investment advice. The articles are written by AI, edited, and checked against company filings — but the judgements are opinions and the figures go stale. How this is made · Terms

⚠ Credit Risk in the Phone BookModerate threat

T-Mobile US (TMUS) — threat to the moat

T-Mobile's bad debt and receivable losses rose to 1.8% of revenue in Q2 2026 from 1.3%.

Every instalment plan is a loan. T-Mobile's bad debt and receivable losses were 1.8% of revenue in the June 2026 quarter, against 1.3% a year earlier1, and its filing singles out subprime customers as vulnerable to weak economic conditions2.

T-Mobile bad debt and receivable losses as a share of revenue (%)1.3Q2 20251.8Q2 2026T-Mobile US Investor Factbook Q2 2026
Half a point more of revenue lost to bad debt.

The phone book also has to be funded. T-Mobile issued $2.0 billion of asset-backed notes secured by $2.6 billion of instalment receivables3, so the cost of the loans depends on credit markets as well as customers.

The filing describes the mechanism plainly: in a weak economy "existing customers may be more likely to terminate service and default on device financing plans due to an inability to pay"4. The two risks arrive together, which is what makes the phone book a credit exposure rather than just a loyalty tool.

The receivables are not the only exposure customers create. T-Mobile's data has been breached before: a January 2023 incident involving an API affected approximately 37 million current postpaid and prepaid customer accounts5. A customer whose data has leaked and whose phone payment is due is a customer with two reasons to reconsider.

The exposure reaches beyond retail customers. The filing warns that weak conditions "may also adversely affect our suppliers, dealers, wholesale partners or MVNOs"6, so the same downturn that raises consumer defaults would squeeze the dealers who sell T-Mobile's phones and the carriers who rent its network.

The switching cost is real only while customers pay. Bad debt and receivable losses rising above 2% of revenue would turn the instalment book from a loyalty device into a credit problem.

References
  1. ReportedT-Mobile's bad debt and receivable losses were 1.8% of revenue in the June 2026 quarter, against 1.3% a year earlier, and its filing singles out subprime customers as vulnerable to weak economic conditions.
    T-Mobile US Investor Factbook for Q2 2026, Form 8-K exhibit 99.2 - quarterly revenue lines, postpaid accounts, churn, ARPA and its drivers, upgrade rate, bad debt, margins, balance sheet and leverage ratios - balance sheet, debt, leverage ratios and shareholder returns. — Q2 2026 · publ. 23 July 2026 · source ↗
  2. ReportedT-Mobile's bad debt and receivable losses were 1.8% of revenue in the June 2026 quarter, against 1.3% a year earlier, and its filing singles out subprime customers as vulnerable to weak economic conditions.
    T-Mobile US, Inc. Form 10-K for fiscal 2025 (year ended 31 December 2025) - Item 1A risk factors. — FY2025 · publ. 11 February 2026 · source ↗
  3. ReportedT-Mobile issued $2.0 billion of asset-backed notes secured by $2.6 billion of instalment receivables, so the cost of the loans depends on credit markets as well as customers.
    T-Mobile US, Inc. Form 10-K for fiscal 2025 (year ended 31 December 2025) - MD&A performance measures: customers, net additions, churn, ARPA and ARPU, and employees. — FY2025 · publ. 11 February 2026 · source ↗
  4. ReportedThe filing describes the mechanism plainly: in a weak economy "existing customers may be more likely to terminate service and default on device financing plans due to an inability to pay".
    T-Mobile US, Inc. Form 10-K for fiscal 2025 (year ended 31 December 2025) - MD&A performance measures: customers, net additions, churn, ARPA and ARPU, and employees. — FY2025 · publ. 11 February 2026 · source ↗
  5. ReportedT-Mobile's data has been breached before: a January 2023 incident involving an API affected approximately 37 million current postpaid and prepaid customer accounts.
    T-Mobile US, Inc. Form 10-Q for the quarter ended 30 June 2026 - Deutsche Telekom ownership and voting control at 17 July 2026, the i3 Broadband and GoNetspeed/Greenlight fiber joint ventures, Auction 113, the Grain spectrum sale, litigation and cybersecurity risk. — Q2 2026 · publ. 23 July 2026 · source ↗
  6. ReportedThe filing warns that weak conditions "may also adversely affect our suppliers, dealers, wholesale partners or MVNOs", so the same downturn that raises consumer defaults would squeeze the dealers who sell T-Mobile's phones and the carriers who rent its network.
    T-Mobile US, Inc. Form 10-K for fiscal 2025 (year ended 31 December 2025) - Item 1 business, the single Wireless segment, competition and the revenue lines with their drivers. — FY2025 · publ. 11 February 2026 · source ↗
Sources
Generated October 6, 2026