I noticed that eKit says on their site that data works in over 70 countries as of 1 September, however they do not indicate the correct settings users need to put into their phone in order to use the service.
My Nokia E61 seems to pick them up just fine upon power-on (it shows up as being from Manx Pronto, which I found out upon a Google search is an Isle of Man mobile telecom, Manx Telecom), however my primary device for this SIM is a generic watch phone, that requires a lot of various data in particular places.
Two examples I have for US operators follow:
AT&T MEdia Net WAP GPRS
APN: WAP.CINGULAR
Username:
WAP@CINGULARGPRS.COM
Password: CINGULAR1
Homepage:
http://device.home
Connection Type: WAP (IP Address: 66.209.11.61, Security: off)
T-Mobile USA T-Zones WAP GPRS
APN: wap.voicestream.com
Username & password are left blank
Authentication Type: Secure
Homepage:
http://wap.myvoicestream.com/
Connection type: WAP (IP address: 216.155.165.50, Security: On)
If anyone knows how I can obtain the correct values to use (I have tried Manx' postpaid settings and they don't work), this thread may be a good place to post them at.