OK, so...
i tried the vodafone SIM in the nokia d211, no joy, it is of course faster than pannongsm
(that i'm sure you've never heard of, it's a hungarian gsm provider
), but i get no more than 4-5 kbyte/sec.
another thing.
i got the chance to try the d211 in a hpc2000 nec mobilepro 900, and only the wlan part works. as for the gprs part... well, i set it up, it connects to the gsm network, i try then to activate gprs. it thinks for a little while before giving me the message "Disconnected". settings are the same as with the jornada 728 and intermec 6651, and can even send SMS from the 900, but can't get online to do gprs. neither with pannongsm nor with vodafone. go figure.
i even tried setting it up in remote networking, modem as d211
(ok the connection was created automatically by the d211 driver, named "GPRS"

, but that didn't help either, either with extra dial strings or without or with another dial number
(varying the 99 thing
), i always got the message modem not answering.
the terminal couldn't connect either, too bad, i would have loved to try and troubleshoot there by using AT commands.
any ideas?
i do know some hungarian user last year was desperate to get this combination to work, d211 & hpc2000 nec 900 and he couldn't... he ended up selling the 900.
before i forget, the driver on a cenet 900c won't even load. can't associate driver dll's
(there are three, one for wlan, one for gsm and one for gprs
) with the card.