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iPhone 4S (and iPhone 4) Speed Test: AT&T vs. Verizon



What happens when you take the same phone (almost) on 3 different carriers and have a speed test party? Nothing special, but it does make for a good conversation.

Tonight, I have some screenshots created by a friend of mine. He took the AT&T iPhone 4S, the Sprint iPhone 4S and the Verizon iPhone 4 and ran some quick speed tests. These tests are just that, tests, and should only be taken at face value. This is a very non-scientific method.

Peter lives in the suburbs of Detroit. According to Verizon’s coverage maps, they have 3G blanketing the entire Detroit area. Sprint’s maps and AT&T’s maps show pretty much solid 3G or better coverage as well. Sprint had 5 bars, AT&T a full 4 bars and Verizon with 3 bars when the tests were run. Only the AT&T phone was below 50% battery life during the tests.

My friend wrote:

I was quite astonished by the results of our test on these phones, all running iOS 5.0.1.

A while back Josh and Xavier did a few speed tests comparing the same iPhone on different carriers at the same location. The results heavily favored AT&T.

Check their tests out:

Earlier tonight with the Samsung Galaxy S II Skyrocket, in a non-LTE market, I got a speed test of 4733kpbs down and 1040kbps up. With my iPhone 4, I can’t get over 3kbps in the same location. Weird how it all works out.

Let’s see some of your screenshots with different phones and OSes.

Source: (Peter Filias)

Disclaimer: These are not my tests. They were performed by an old friend who ran a competing Dell Axim website back in the day.



  1. Anonymous

    12/01/2011 at 9:21 pm

  2. Guest

    12/04/2011 at 7:32 am

    Highly doubt Sprint is faster than Verizon in the majority of markets, that’s been shown over and over again. I’ve never seen AT&T hit over 7 Mbps download while I have had them. At best, I’ve seen about 2.5Mbps in any city. But then, I’ve never been to Detroit.

  3. Craig

    12/06/2011 at 6:39 am

    AT&T, San Francisco suburbs:

    Speedtest iPhone 4s
    PING 129ms, DOWNLOAD 2.6Mbps, UPLOAD 0.28Mbps

  4. Brad

    12/22/2011 at 3:01 pm

    Did anyone else notice the tests did nto all test agains the same servers? The at&t test was to a server in Detroit, while the other 2 cities are blured, its clear that they are not detroit..

    That test is invalid because they were not all to the same location

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