Hi. AT&T upgraded my area to 3G 6/11. My Option 3.6 Express AirCard, using Leopard to Connect, kept using 2.5G (EDGE); d/l remained 16KB/sec (96 kbps) (red led only). So I went here:
http://support.option.com/att/ I already had the latest FirmWare, and there is a sidebar link to a GT Mac Connect download, released 01/08, for Mac OSX 10.4.11x and Mac OSX 10.5x. WhoooEee, got that, it is Globetrotter (again, but good this time); so I select '3G only' in GT Preferences (which I could not do in Leopard Connect) and I have the connection now: blue led only: 898 kbps (112 KB/sec). Joy.