Measuring the customer base: subscribers, penetration and market share

Why subscriber counts are messy

Telecom companies report "subscribers," but that word hides real accounting choices. Three counting conventions matter:

• Connections vs. unique subscribers: One person with a phone, a tablet SIM and a smartwatch counts as three connections but one human. Most reported figures are connections, not people.
• Prepaid vs. postpaid: Postpaid customers sign a contract and get billed monthly (higher average revenue, lower churn). Prepaid customers pay upfront with no contract (lower revenue, higher churn, easier to count generously). Operators often report these separately because they behave like different businesses.
• Active vs. registered: Some prepaid counts include SIMs that haven't been used in 90 days. Regulators in some markets require operators to strip these out; others don't, which is why cross-country comparisons need care.

Rule of thumb: always check whether a subscriber number is "connections" and whether it separates prepaid from postpaid before comparing two companies.

Penetration rate: the market's speed limit

Penetration rate = total connections ÷ population, expressed as a percentage.

This tells you how close a market is to saturation, not how many humans have phones.

Worked example: A country has 68 million mobile connections and a population of 60 million.

Penetration = 68,000,000 ÷ 60,000,000 = 1.13, or 113%.

Penetration above 100% is normal and common in developed markets (it's the multi-device effect above). The US mobile penetration rate is estimated at over 110% as of recent years; several Western European markets sit in a similar 110% to 130% range. When penetration approaches or exceeds this level, growth for the whole market must come from something other than "adding new humans": SIM upgrades, IoT (Internet of Things: connected devices like smart meters and connected cars) connections, or 5G upsell, not new customers.

This matters financially: a market near saturation forces operators to compete for *share*, not for new *growth*, which changes what metric investors should watch (ARPU, discussed below, over subscriber growth).

Market shareMarket shareThe percentage of total industry sales your company captures in a given period. It measures competitive position relative to rivals in a defined market.Voir la définition complète →: the number that needs a denominator

Market shareMarket shareThe percentage of total industry sales your company captures in a given period. It measures competitive position relative to rivals in a defined market.Voir la définition complète → = a company's subscribers (or revenue) ÷ total market subscribers (or revenue).

The critical question: share of *what*? Connections and revenue shares can diverge sharply because postpaid customers generate more revenue per head than prepaid.

Worked example: Operator A has 25 million connections in a market of 100 million total connections.

Connection share = 25,000,000 ÷ 100,000,000 = 25%.

But if Operator A's customers are disproportionately postpaid (high value), its *revenue* share might be 32%. That gap tells you the operator has a premium customer mix, a genuinely important competitive fact that a pure subscriber count hides.

Why 30% share means different things in the US and Germany

Market structure, not just size, changes what a share number implies.

• United States: A duopoly-plus-one structure dominated by AT&T, Verizon and T-Mobile US, with T-Mobile having grown share significantly since its 2020 merger with Sprint (a deal cleared by the FCC and Department of Justice with conditions). Three national players control the overwhelming majority of the market. A 30% share here means you are one of a small number of scaled, profitable national competitors in a market with relatively high ARPU (Average Revenue Per User, monthly revenue divided by subscriber count) by global standards, estimated in the $40 to $55 range per postpaid phone connection.
• Germany: A four-network-turned-three-plus-MVNO market historically featuring Deutsche Telekom, Vodafone and Telefónica Deutschland (O2), alongside 1&1 building a newer fourth network. German mobile ARPU is estimated to be roughly half US levels, partly due to stronger price competition and EU-driven consumer protections (including the end of intra-EU roaming charges under the "Roam Like at Home" regulation). A 30% share in Germany means real scale, but against lower per-customer revenue and a regulatory environment more willing to protect a fourth entrant to preserve competition.

Same 30%, different profit pool, different regulatory backdrop, different growth story. This is why sell-side telecom analysts never quote share without naming the market's ARPU and structure alongside it.

Reading the numbers together: a mini framework

When you see subscriber figures, run this three-step check:

1. Base check: Connections or unique users? Prepaid, postpaid, or blended?

2. Penetration check: Is this market near saturation (over ~100%) or still growing? That tells you whether subscriber *growth* or ARPU *growth* is the more meaningful story.

3. Share check: Share of connections or share of revenue? A gap between the two reveals customer mix quality.

Regulatory data sources worth knowing: In the US, the FCC's Communications Marketplace Report is the benchmark public reference. In Europe, the European Commission's Digital Decade / DESI reports and national regulators (Germany's Bundesnetzagentur, for example) publish comparable market data. Analysts also lean on independent trackers like GSMA Intelligence for global mobile benchmarks.

🎬 [VIDEO: "How Telecom Companies Make Money" - youtube.com - search this exact phrase on YouTube for an accessible explainer on subscriber economics and ARPU that complements this lesson]

Putting it together: a quick comparative snapshot

Treat all figures below as rounded, recent-year estimates, useful for orders of magnitude, not for citation in a filing.

| Metric | United States (est.) | Germany (est.) |

|---|---|---|

| Total mobile connections | ~120 million+ (postpaid-heavy) | ~27 million (blended market varies by source) |

| Penetration rate | ~110%+ | ~110-120% |

| Number of major national networks | 3 (AT&T, Verizon, T-Mobile) | 3 network operators plus growing 4th (1&1) |

| Approximate postpaid ARPU | $40-55/month | roughly half of US level |

The key lesson from this table isn't the exact numbers (which shift yearly and by source methodology). It's that penetration tells you the ceiling, market structure tells you the competitive intensity, and ARPU tells you whether share is worth having.

A operator chasing subscriber growth in a market already above 100% penetration is often really fighting for share, at margin cost through promotions and handset subsidies, rather than genuinely expanding the market. Recognizing this distinction is one of the fastest ways to sound sector-fluent in a telecom finance discussion.

Key Takeaways

• Always check the base: "subscribers" often means connections, and prepaid vs. postpaid mix changes what a subscriber count is worth in revenue terms.
• Penetration rate (connections ÷ population) tells you if a market is still growing organically or if operators are fighting over a fixed pie; developed US and European markets both sit above 100%, an estimate that signals saturation, not literal over-100%-of-humans coverage.
• Market share needs a denominator: connection share and revenue sharerevenue shareThe percentage of total industry sales your company captures in a given period. It measures competitive position relative to rivals in a defined market.Voir la définition complète → can diverge significantly; the gap reveals customer quality (premium postpaid mix vs. bulk prepaid).
• The same share percentage means different things across markets: US operators enjoy higher ARPU and a tighter three-player structure; German (and broader EU) operators face lower ARPU and stronger regulatory pressure to preserve a fourth competitor.
• Use public regulator and industry data (FCC Communications Marketplace Report, European Commission DESI, GSMA Intelligence) rather than press releases alone when comparing markets, since counting conventions vary by source.