Apple’s popular iPhone invigorated the smartphone market, and recent rumors about the handset’s possible expansion to Verizon are renewing debate over which U.S. carrier offers the highest quality service.
It’s difficult to say whose network is best: Each carrier advertises itself as the speediest and most reliable. Consumer experiences with each network vary on a case-by-case basis; some AT&T customers swear their network is the worst, while a number of Verizon users are preaching that theirs is superb — and vice versa. Customers on the smaller U.S. networks, T-Mobile and Sprint, are just as inconsistent in terms of satisfaction.
As of 2008, over 20 million U.S. homes rely solely on mobile phones for telecom communication, according to research company Nielsen. Therefore, it’s clear that in recent years the value of a high-quality, efficient cellphone connection has grown tremendously for the everyday consumer. A missed or dropped call can potentially ruin a relationship, cost job seekers career opportunities or simply create a persistent annoyance.
A carrier’s network performance is a dealbreaking factor for consumers shopping for a smartphone, whether it’s the iPhone, the HTC G1, or a BlackBerry Storm. Just which cellphone network is the best? Or better yet, which carrier is best for you in your particular area? In August, Wired.com conducted a global study to investigate the iPhone 3G’s network issues, which concluded that connection problems were tied to AT&T rather than the handset itself. Following up on that survey, Wired.com is inviting every 3G smartphone user in the United States to participate in a study to determine which carrier is the best overall in the country.
The process involves running a data speed test on your browser-equipped smartphone, followed by plotting your results on an interactive map with your computer. Ultimately, consumers will be able to view the results on the map to see how well each carrier performs in different parts of the country.
Follow the instructions below to complete the test, which will take about five minutes.
1. Ensure Wi-Fi is turned off and 3G is enabled on your smartphone (not the slower EDGE connection).
2. Load your smartphone’s browser and visit http://inetworktest.com/wired.*
3. The test will run automatically as the page loads. When it’s done loading, tap your carrier (AT&T, Verizon, T-Mobile or Sprint), and your results will appear.
4. On your computer screen, scroll to the ZeeMap at the top of this article and click the Add button. Fill in the Location and Details fields (see screenshots below for examples). For “General Satisfaction” rate your satisfaction on a scale from 1 to 5 — low satisfaction to high satisfaction, respectively.


5. Click Submit to complete the survey. Your entry should look similar to the example in the screenshot below.

*JavaScript must be enabled to run the data test page. Some BlackBerry devices have JavaScript turned off by default. See these instructions to learn how to turn JavaScript on for BlackBerry devices.
And then you’re done. After a week of collecting data, Wired.com will compile the results and highlight noteworthy conclusions about each carrier.
We strongly encourage smartphone owners to complete the test: The more participants, the better the conclusions we can reach. E-mail your questions or concerns about the test to BChen [at] Wired [dot] com, or add them in the comments section below.
Wired.com would like to extend a special thanks to Ben Reubenstein of Xcellent Creations, who designed the 3G data test for this study. iPhone and iPod Touch owners interested in learning more about data performance on their devices can download the iNetwork app for $1 through the App Store.
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