The entire states of West Virginia, Montana, North Dakota, and South Dakota have zero native coverage. Ostensibly, these markets are covered by the UMTS roaming agreement with AT&T that went active this year. Alaska has zero native coverage, but it served with roaming agreements with local GSM operators in some areas. Geographically, large amounts of Washington, Oregon, Nevada, Idaho, Colorado, Utah, Iowa, Arkansas, Mississippi, Alabama, and the New England area are not covered by a native network either. T-Mobile has spectrum licenses to deploy in these areas. For one reason or another, it has chosen not to. But T-Mobile needs to do something soon about those states, because it has a lot of spectrum that it paid a lot of money to get. If it doesn?t do something with them, it could lose those licenses at the end of the decade.
In the areas where T-Mobile does have a native network, most of it is 2G-only. A bit of it is still GPRS, but nearly all of the 2G network has EDGE now. With the major markets all modernized, T-Mobile needs to push forward in markets that have been neglected over the years.