According to my checks of AT&T’s online coverage tool, this map should be pretty accurate as far as AT&T’s 3G coverage over the Metro-North area. However, this is not official, so double-check with AT&T if you’re not sure.

Before you go to your local Apple or AT&T store on Friday morning to get the new 3G Apple iPhone, there is probably something you should know:

Most of New York and Connecticut are not covered by AT&T’s 3G wireless internet service.

On this AT&T Wireless US Coverage Map updated in April, the blue areas are the only areas with AT&T 3G service.

As you can see - many states, including New Hampshire, Vermont, and Maine - really don’t appear to have any AT&T 3G coverage at all ( a little bit over the border on 95 in NH ).

If you ride Metro-North, I checked the coverage on all 3 lines using AT&T’s online tool to give you a good idea of if you have coverage or not.

-On the Hudson Line, Tarrytown seems to be the last stop with AT&T 3G Coverage.
-On the Harlem Line, AT&T 3G Coverage seems to end just south of Mt Pleasant.
-On the New Haven Line, the main line and New Canaan branch are covered. Wilton is the last town on the Danbury branch with 3G. The Waterbury branch stops have no 3G coverage at all.

Now, this does not mean you will not have internet access in these areas - any area with dark orange should have good EDGE coverage - the slower coverage available on the original iPhone. As far as I can tell, all of Metro-North should have EDGE at least - but again, check with AT&T if you are unsure.

After checking Verizon and Sprint’s 3G Coverage Maps, all of Metro-North should be covered by 3G from either of those two providers - Verizon seems to have blanket 3G coverage - Sprint has some minor dead spots outside of towns in the northwest corner of CT.

Use the following tools to check your local coverage:

Sprint Wireless Coverage Tool (be sure to select ‘data’)
AT&T Coverage Viewer (painfully slow - make sure you check the box for 3G coverage)
Verizon Coverage Locator