Which carrier has the best coverage where you live?

Why do carrier coverage maps all disagree?

<p><strong>TL;DR.</strong> Because they are propagation models, not measurements. Each carrier runs its own simulation with its own assumptions about terrain, building loss and what counts as usable signal, then publishes the result as a map. Three carriers can therefore show full coverage over the same dead zone, and all three can be telling the truth about their own model.</p><p>The FCC has spent years pushing carriers toward challengeable, measurement-backed maps through the <a href="https://www.fcc.gov/BroadbandData" rel="nofollow noopener">National Broadband Map</a> precisely because self-reported coverage was so unreliable. Treat any carrier map as a marketing artifact that happens to contain useful information.</p>

How do the three big carriers compare by cell count?

<p>Recorded cells are a harder number than a shaded map. Across the United States the FindTower database holds 8,358,147 cell records from 17 operators: T-Mobile 2,703,805, AT&amp;T 2,694,558, Verizon 1,225,037, legacy Sprint 1,612,971 now inside T-Mobile, and US&nbsp;Cellular 75,052.</p><p>Read that as transmission density rather than as a league table. Verizon has historically built with higher-power sites covering more ground per cell, so a lower record count does not translate into worse service. What the numbers do settle is that the T-Mobile and AT&amp;T networks are closely matched nationally, which no carrier map will ever admit.</p><p class="ft-caveat"><em>A cell record is one transmitting sector, not one mast. A single tower commonly carries three sectors per band per carrier, so these counts track how densely a carrier transmits rather than how many structures it owns. Counts come from the FindTower database, last rebuilt on 2025-11-22.</em></p>

What should you check before switching carriers?

<p>Check the four places you actually use a phone: home, work, the commute between them, and wherever you spend weekends. A carrier that wins on a national map can lose all four. Coverage is local to a degree that no national comparison can capture, which is why per-city comparison beats any nationwide verdict.</p><p>Then test rather than trust. Most carriers offer a trial eSIM that runs for a week or two at no cost, which produces better evidence than every coverage map put together. Run it at your kitchen table and at your desk, indoors, where the maps are least reliable.</p>

Related guides

<ul><li><a href="https://findtowerapp.com/coverage">Coverage maps by state and city</a></li><li><a href="https://findtowerapp.com/5g-towers-near-me">How to find 5G towers near you</a></li><li><a href="https://findtowerapp.com/cell-phone-dead-zones">Why dead zones happen</a></li><li><a href="https://findtowerapp.com/best-cell-phone-carrier-by-location">Choosing a carrier by location</a></li><li><a href="https://www.fcc.gov/BroadbandData" rel="nofollow noopener">FCC National Broadband Map</a></li><li><a href="https://opencellid.org/" rel="nofollow noopener">OpenCelliD, the open cell tower database</a></li></ul>

Key takeaways

<ul><li>Carrier coverage maps are propagation models, not measurements, and each uses its own threshold.</li><li>T-Mobile and AT&amp;T are within one percent of each other on recorded US cells.</li><li>Verizon records fewer cells but has historically built higher-power sites, so counts mislead.</li><li>Indoor coverage is typically one category worse than the map shows.</li><li>A trial eSIM at your own address beats every comparison map.</li></ul>

Frequently Asked Questions

Why do carrier coverage maps disagree with each other?

Each carrier runs its own propagation model with its own assumptions about terrain, building penetration and the signal level that counts as covered. Nothing is standardised, so three carriers can shade the same area differently and each be accurate to its own model.

Which carrier has the most cell towers in the US?

By recorded cells in the FindTower database, T-Mobile leads with 2,703,805, then AT&T with 2,694,558 and Verizon with 1,225,037. These are transmitting sectors rather than physical masts, and they measure density rather than service quality.

Is Verizon worse because it has fewer recorded cells?

No. Verizon has historically deployed fewer, higher-power sites covering more ground per cell, so a lower record count reflects a different build strategy rather than worse service. Compare at your own address instead of nationally.

Are coverage maps accurate indoors?

Rarely. Most maps model outdoor signal, and indoor coverage is usually one category worse because exterior walls attenuate higher frequencies heavily. If a map shows marginal coverage outdoors, expect no usable indoor service at that address.

What is the best way to compare carriers before switching?

Test at the four places you use a phone most: home, work, the commute and weekends. Trial eSIMs from most carriers run a week or two free and produce real measurements, which beats comparing maps that were never measured in the first place.