So I’m sure I’m not the only one to do this, but after reading one of my friend’s tweets, I decided to compare for myself the coverage maps of Verizon and AT&T. Since Verizon’s 3G coverage comparison page also included Sprint and T-Mobile, I figured I’d look into those too. Here’s what each Verizon says about each provider, and what each other provider says about their services:
First, Verizon’s voice coverage map:

AT&T’s voice coverage map:

Sprint’s voice coverage map:


T-Mobile’s voice coverage map:

Ok, there you go. There’s the voice coverage maps and legends (if needed). Verizon’s and AT&T’s maps were both pretty much, “you have it here, you don’t have it here,” really no need for a legend.
Next I’ll compare the Data/Broadband coverage:
Verizon:


AT&T:

Sprint:


T-Mobile:

Ok, there’s the data coverage. This may or may not include 3G, I’m not sure, though I doubt it. I can still access the web from my phone in certain areas without 3G or Wi-fi.
Finally, I’ll compare Verizon’s 3G claims side-by-side with the claims of the other providers. The maps from the providers will be the same as above, but put in again for easier comparison.
Verizon claims their 3G coverage is:

- Verizon 3G coverage map
Verizon also says their Broadband coverage is:

Some small differences, though I can’t say for sure that the Broadband coverage is all 3G. It seems most likely that if you were to overlay the 3G map over the Broadband map, the places that are left as blue or green would have Broadband access, but not 3G.
Verizon claims AT&T’s 3G coverage to be:

Again, AT&T’s data coverage is:

On a side note, Verizon’s map of AT&T’s 3G coverage looks a bit similar to AT&T’s Mobile TV coverage map, doesn’t it? (see below):

(Just in case you were wondering, Verizon’s mobile tv coverage map isn’t much different than AT&T’s.)
So, while I do have to say the same thing regarding data coverage vs. 3G, AT&T does say (copied + pasted from the AT&T website),
AT&T has the nation’s fastest 3G network. This network covers 233 million people or 75% of the population. All AT&T 3G devices connect to AT&T’s EDGE network covering 301 million people or 96% of the population. With both 3G and EDGE coverage, customers can access the Internet, send e-mail, surf the Web, stream music, download videos, send photos, text, talk and more. The only difference — with some data applications, 3G is faster than EDGE. AT&T’s GPRS network covers 303 million people, allowing you to talk, text, e-mail and access basic websites optimized for wireless.
So, even if Verizon’s map of AT&T’s 3G coverage is accurate, AT&T’s 3G coverage reaches 75% of the population just fine. So while 25% of people may be out of luck there, Verizon probably has to charge more to cover the cost of all that 3G coverage that a minimum number of people use.
Edit: So I just found a page on AT&T’s site that seems to be a rebuttal to Verizon’s commercials. It’s here: http://www.att.com/truthabout3g.
Next is Verizon’s map of Sprint’s 3G coverage:

vs Sprint’s Data coverage map:


Finally, Verizon’s map of T-Mobile’s 3G coverage:

vs T-Mobile’s data coverage map:

There you have it. A comparison of each provider’s coverage using maps provided by their own sites. I tried to be impartial, and I feel I have succeeded. I personally like AT&T the best, but only because I am a loyalist and have had AT&T since before cellphones became mainstream (our landline provider was AT&T). My preference is not based on any data, factual or fictional, and I really have nothing against the other providers. If I’ve offended anybody who happens upon this post (not that I expect anybody to read this), please let me know in a civil manner, and I will do my best to resolve the problem.