I didn't mention this but I have had the PCMCIA card from T-Mobile in 2 years and the coverage is still good for the price. It's most sketchy (if any coverage) whenever I'm a passenger in vehicles on roads that are between metro areas and/or near rivers/trees (where there are likely less strength).
I had learned not to play cash NL rings poker quickly about 1 1/2 years ago, LOL, when I was accused of not being responsive when I failed to call a raise to an Ace flush at turn when I also hit Queen flush, yikes. Ironically, nobody complained 10 minutes earlier when I disconnected after I pushed all-in with KK and not knowing that one did call (with QQ) and few minutes later, I find my table $$ doubled up, ha.
Anyway, I have used my T-Mobile PCMCIA card even on commuter trains where I saw I only had like less than 5 minutes to make a bet before game started, and I still was able to make the bet on the laptop (this was between Baltimore, MD, and Washington, DC).
So that's my extra cents worth of tidbits, grins.
* CalvinTy