
Which Cellular Service Provider in Seattle Was the First One to Deliver 2.5 G Services to Its Consumers
Cingular and T-mobile both are based off of GSM and both of them have EDGE wireless broadband coverage in Seattle so they are identical. This is because technically both of them offer the same exact speed for data plans:
http://askville.amazon.com/offers-BlackBerry-data-service-Seattle-Cingular-T-Mobile/AnswerViewer.do?requestId=1097777
The prime difference would be therefore only because of the number of towers that each service provider has in Seattle.
However, it is important to note that Cingular offers a higher speed solution called UMTS/HSDPA in selected major metropolitan areas. In these coverage areas you'll enjoy 400 to 700 Kbps bandwidth on average with bursts up to 1.8 Mbps. Elsewhere, Cingular uses the EDGE and GPRS service like T-Mobile.

