4G LTE & 5G Coverage In San Bruno

The table below shows the proportion of San Bruno with coverage from different cellular technologies.

Network	4G Coverage	5G Coverage
AT&T	100%	100%
T-Mobile	99%	88%
Verizon	100%	100%
Dish	0%	50%

Don't be alarmed by Dish's lack of 4G coverage in San Bruno. Dish has a newly-built network that's 5G-only.

US Cellular And Dish Roaming Coverage

US Cellular does not have native coverage in San Bruno. However, some US Cellular subscribers may still have coverage in San Bruno thanks to roaming agreements.

The 50% figure for Dish may understate what subscribers in San Bruno experience after accounting for roaming agreements.

Millimeter Wave 5G

Parts of San Bruno have millimeter wave 5G coverage. This novel celluar technology offers extremely fast speeds, but the coverage potential is limited. Millimeter waves aren't well-suited for traveling long distances.

Network	Millimeter Wave
Verizon	?
AT&T	✓
T-Mobile	?

Millimeter wave coverage in San Bruno is likely sparse (mostly limited to dense, outdoor areas like popular parks or sports stadiums).

San Bruno Cell Signal Strength

There are 129 map hexes within the census-defined boundaries of San Bruno. The table below shows the proportion of hexes at various levels of signal strength. Where both 4G and 5G coverage is available, data is drawn from whichever technology offers a stronger signal.

Network	Strong	Decent	Weak	None
AT&T	16%	69%	15%	0%
T-Mobile	59%	37%	3%	1%
Verizon	48%	52%	0%	0%
Dish	0%	33%	17%	50%

For most purposes, decent signals are perfectly sufficient. Weak or non-existent signals cause far greater degradation in user experience.

Crowdsourced Coverage Data In San Bruno

Coverage Critic has 2,737 crowdsourced data points from 86 map hexes within the boundaries of San Bruno. Data is available for AT&T, T-Mobile, and Verizon.

Network	Unique Hexes	Total Observations
AT&T	71	1,545
T-Mobile	71	1,037
Verizon	29	131

Click here to toggle to the map's crowdsourced data layer.

California State-Wide Coverage Scores

Network	Coverage Score
Verizon	8.8 / 10
AT&T	8.6 / 10
T-Mobile	8.2 / 10

Data Sourcing

Coverage maps draw on data from the FCC's Broadband Data Collection and Coverage Critic's crowdsourcing.

The coverage information for San Bruno is rated as medium-high confidence. Documentation is available elsewhere covering limitations of Coverage Critic's approach.