News Release

New IHS Markit Reports Reveal Impressive Mobile Data Speeds Across Silicon Valley

New IHS Markit Reports Reveal Impressive Mobile Data Speeds Across Silicon Valley

June 04, 2019

Carrier speeds in San Jose are now on par with or better than those in San Francisco


Silicon Valley is globally recognized as a technology innovation hub. New findings from RootMetrics by IHS Markit, the standard for mobile performance benchmarking, show that AT&T and Verizon continue their reign over the fast-paced, entrepreneurial region, sharing the Overall Performance RootScore Awards in both San Francisco and San Jose.

However, speed gains across the board in San Jose are helping change the landscape. In fact, with all four carriers recording median download speeds above 30.0 Mbps, San Jose outpaced San Francisco in this round of testing.

Data Performance in Silicon Valley

When it comes to data performance, AT&T and Verizon dominate in Silicon Valley. The trend starts in San Francisco, where the carriers have shared the Network Reliability and Data Performance RootScore Awards for two reports in a row. In this testing cycle, AT&T and Verizon once again outpaced the other carriers to record the fastest median download speeds in San Francisco at 32.9 Mbps and 32.8 Mbps, respectively. AT&T also showcased major speed gains in San Jose, increasing its median download speed from 26.7 Mbps to 35.0 Mbps and its median upload speed from 8.0 Mbps to 11.3 Mbps.

While AT&T and Verizon continued their strong Silicon Valley performance, T-Mobile and Sprint also exhibited noteworthy data speed improvements. T-Mobile offered the fastest median upload speeds in both San Francisco and San Jose, recording 13.8 Mbps and 18.8 Mbps, respectively. T-Mobile also won the Data Performance RootScore Award outright in San Jose, where it previously shared the award with Verizon. And Sprint set the pace with the fastest median download speed in San Jose at 37.4 Mbps, while also nearly doubling its median download speed from 16.6 Mbps to 30.0 Mbps in San Francisco.

“Our recent mobile performance benchmarking tests in Silicon Valley show that all four carriers are working to deliver the speeds end users in the region demand,” said Francis Sideco, vice president, technology at IHS Markit. “While the carriers continue to provide first-rate mobile experiences in San Francisco, impressive data speed increases from all carriers in San Jose suggest that business and residential users are likely to find strong mobile performance across Silicon Valley.”

Comprehensive Testing

To evaluate the mobile experience in each city, IHS Markit conducted tests across all hours of the day and night using smartphones purchased off the shelf at carrier stores. Testing metrics for each city include the following:

  • Tests in San Francisco were conducted from April 14 through 26 at 72 indoor locations and while driving 1,236 miles.
  • Tests in San Jose were conducted from January 24 through 29 at 40 indoor locations and while driving 857 miles.

For details about RootMetrics testing, see the methodology section of the RootMetrics website.

A Holistic Look at 5G

As network operators across the globe race to deploy 5G, IHS Markit has launched “5G First Look,” a new service that provides insight into the world of 5G and how 5G networks perform from the consumer’s perspective. It includes 5G readiness benchmarks, 5G smartphone teardown analysis and first look results from 5G network performance testing in South Korea, the United States, Switzerland and the United Kingdom—with more countries and regions added as 5G networks are launched across the globe.

About RootMetrics by IHS Markit (

RootMetrics by IHS Markit is mobile analytics that measure mobile network performance and offers insights into the consumer mobile experience. IHS Markit provides data on mobile network performance to help the networks improve and give consumers an end-to-end look at mobile performance. To ensure that RootMetrics reflects real-world mobile usage, testing is conducted based on where, when and how consumers use their smartphones most often.

About IHS Markit (

IHS Markit (Nasdaq: INFO) is a world leader in critical information, analytics and solutions for the major industries and markets that drive economies worldwide. The company delivers next-generation information, analytics and solutions to customers in business, finance and government, improving their operational efficiency and providing deep insights that lead to well-informed, confident decisions. IHS Markit has more than 50,000 business and government customers, including 80 percent of the Fortune Global 500 and the world’s leading financial institutions.

IHS Markit and RootMetrics are registered trademarks of IHS Markit Ltd. and/or its affiliates. All other company and product names may be trademarks of their respective owners © 2019 IHS Markit Ltd. All rights reserved.

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