I tether my phone to laptop when on transit, but WiFi is a nice option if free. On plane, since there is no cell service, paying $5 for WiFi is worth it per leg - really shortens the flight. I'm not willing to pay over $10 though. Are gogo codes still good?
Exactly. Penn station and its river tunnels have microcells all over. Can't remember if Baltimore tunnels had cell service or not. There are multiple 3G providers, just go with one. You'll have uninterrupted service the entire trip. Its just smarter to pay for a 3G connection ONCE per month, than pay at many different wifi spots, which you have no guarantee of them existing where you need them.