SMS works fine, but can't open TCP/IP connection

[goodwordalchemy]

I have a SIM from an att gophone hotspot. It's data only. I'm sure there is data available, but no voice and messaging. I've gotten the modem to work, but I can't get the tcp connection example to work. I've tried replacing the apn name "cmnet" with both "wap.cingular" and "isp.cingular," but I haven't had any luck. Can you recommend any next steps?

[goodwordalchemy]

Just upgraded my sim card to include voice and data, just to rule that out. Still no luck

[goodwordalchemy]

GPRS_sendSMS example code works fine though, but still no luck with the TCP/IP connection. Serial readout is:

"gprs join network error
gprs join network error
gprs join network error"

[goodwordalchemy]

new Development:

I re-downloaded all of my arduino libraries. I had not installed them properly. I am still not getting any connection with the default TCP connection in the example. This is my serial readout now:

"IP Address is 10.0.181.0
connect error
waiting to fetch...
fetch over...
"

[mandyala]

any luck with the tcp/ip...getting the same error