GSM users (AT&T, T-Mobile) get EDGE service from iWireless by roaming agreements. 5 bars at the Wisconsin Motorcycle Memorial and Door Devils' Hill.

Downtown is a mix of Einstein PCS and iWireless (aka Bug Tussel) roaming agreements, with the later providing EDGE coverage throughout most of the Door County peninsula. AT&T currently has no towers of their own in Door County, which is a tourism mecca full of businessmen wanting to use their iPhones. Currently no 3G coverage. Best coverage is bayside, where you can also hit AT&T towers across the bay from Menominee MI. Quality drops off to zero along much of the lakeside.

Decent in-town rating, especially around Sturgeon Bay and points south along 42 / 57, and north up to Bailey's Harbor. Reception spotty around Bailey's Harbor- with older phone and battery.

Overall great. In partnership with Cellcom, which I had for a couple years. Probably overall the best in Door Co. along with Verizon. Weakest spot around Valmy. Bayside works the best.

New cell tower at Valmy improved coverage.

Lakeside coverage poor due to tower location on bay side (but bayside coverage a good 5 bars). AT&T GSM coverage is thru partnership with Einstein Wireless / Airadigm (AT&T presently has no towers of their own in this county).

Okay service but can't get into voice mail to hear messages. Frustrating.

No signal at Lily Bay Park and boat launch (Sevastopol Township). Could be a problem for emergency services.

poor-to-no reception

Poor reception in Valmy on Highway, but one hilltop away from the highway yields 3 bars.