KT vs T vs VZ vs TMUS vs LUMN

For growth investors, T-Mobile US, Inc.

(TMUS) is the stronger pick with 8. 5% revenue growth year-over-year, versus -5. 4% for Lumen Technologies, Inc. (LUMN). AT&T Inc. (T) offers the better valuation at 8. 3x trailing P/E (10. 9x forward), making it the more compelling value choice. Analysts rate KT Corporation (KT) a "Buy" — based on 5 analyst ratings — the highest consensus in this comparison. The "better buy" depends entirely on your goals: growth investors should weight revenue trajectory, value investors should weight P/E and PEG, and income investors should weight dividend yield and streak.

On trailing P/E, AT&T Inc.

(T) is the cheapest at 8. 3x versus T-Mobile US, Inc. at 20. 0x. On forward P/E, KT Corporation is actually cheaper at 0. 0x — notably different from the trailing picture, reflecting expected earnings growth. The PEG ratio (P/E divided by earnings growth rate) is the most growth-adjusted single valuation metric: KT Corporation wins at 0. 00x versus T-Mobile US, Inc. 's 0. 62x — a PEG below 1. 0 traditionally signals the market is underpricing earnings growth.

Over the past 5 years, KT Corporation (KT) delivered a total return of +88.

7%, compared to -28. 8% for Lumen Technologies, Inc. (LUMN). Over 10 years, the gap is even starker: TMUS returned +407. 2% versus LUMN's -35. 6%. Past returns do not guarantee future results, and the stock with the higher historical return may already have its best growth priced in.

By beta (market sensitivity over 5 years), T-Mobile US, Inc.

(TMUS) is the lower-risk stock at -0. 28β versus Lumen Technologies, Inc. 's 2. 83β — meaning LUMN is approximately -1111% more volatile than TMUS relative to the S&P 500. On balance sheet safety, KT Corporation (KT) carries a lower debt/equity ratio of 63% versus 2% for T-Mobile US, Inc. — giving it more financial flexibility in a downturn.

By revenue growth (latest reported year), T-Mobile US, Inc.

(TMUS) is pulling ahead at 8. 5% versus -5. 4% for Lumen Technologies, Inc. (LUMN). On earnings-per-share growth, the picture is similar: KT Corporation grew EPS 277. 9% year-over-year, compared to -30. 4% for Lumen Technologies, Inc.. Over a 3-year CAGR, KT leads at 3. 7% annualised revenue growth. Higher growth typically commands a higher valuation multiple — check whether the premium P/E or P/S is justified by the growth rate using the PEG ratio.

AT&T Inc.

(T) is the more profitable company, earning 17. 4% net margin versus -14. 0% for Lumen Technologies, Inc. — meaning it keeps 17. 4% of every revenue dollar as bottom-line profit. Operating margin tells a similar story: TMUS leads at 21. 2% versus -1. 5% for LUMN. At the gross margin level — before operating expenses — T leads at 79. 8%, reflecting greater pricing power or product mix advantage. Stronger margins indicate durable pricing power, lower cost of revenue, or higher mix of software/services. They are one of the clearest signs of business quality.

The PEG ratio (forward P/E divided by expected earnings growth rate) is the most precise measure of undervaluation relative to growth potential.

By this metric, KT Corporation (KT) is the more undervalued stock at a PEG of 0. 00x versus T-Mobile US, Inc. 's 0. 62x. A PEG below 1. 0 is traditionally considered the threshold for growth-adjusted undervaluation. On forward earnings alone, KT Corporation (KT) trades at 0. 0x forward P/E versus 18. 5x for T-Mobile US, Inc. — 18. 4x cheaper on a one-year earnings basis. Analyst consensus price targets imply the most upside for TMUS: 30. 8% to $254. 08.

In this comparison, VZ (5.

8% yield), T (4. 5% yield), KT (3. 8% yield), TMUS (1. 9% yield) pay a dividend. LUMN does not pay a meaningful dividend and should not be held primarily for income.

For long-horizon retirement investors, T-Mobile US, Inc.

(TMUS) is the stronger choice — it scores higher on the combination of lower volatility, dividend reliability, and long-term compounding (low volatility (β -0. 28), 1. 9% yield, +407. 2% 10Y return). Lumen Technologies, Inc. (LUMN) carries a higher beta of 2. 83 — meaning larger drawdowns in market downturns, which matters significantly when you cannot wait years for a recovery. Both have compounded well over 10 years (TMUS: +407. 2%, LUMN: -35. 6%), confirming both are viable long-term holds — but the lower-volatility option typically results in less emotional selling during corrections. Retirement portfolios generally favour predictability over maximum returns. Consult a financial advisor before making allocation decisions.

Both stocks operate in the Communication Services sector, making this a peer-level intra-sector comparison — the same macro tailwinds and headwinds will affect both.

In terms of investment character: KT is a mid-cap deep-value stock; T is a mid-cap deep-value stock; VZ is a mid-cap deep-value stock; TMUS is a large-cap quality compounder stock; LUMN is a small-cap quality compounder stock. KT, T, VZ, TMUS pay a dividend while LUMN does not, making them suitable for different income and tax situations. These fundamental differences mean investors should not choose between them on a single metric — the "better stock" depends entirely on which of these characteristics aligns with your investment strategy.