July 26, 2010
about 4 years ago
I also got a prepaid T-mobile SIM card and am trying to make a TCP connection to a server. I successfully sent an SMS message, but could not get data to transfer over GPRS. The connection to the server is established (after AT+SDATASTART=1,1) but data is not coming through.
Called T-mobile customer service, and the guy told me that this was impossible because of the security protocols associated with the prepaid SIM cards. He said that getting a plan would work no problem, but that involves a 2 yr contract and $50/month or so, which sucks.
Using the SIM card from my iPhone (AT&T) worked fine, by the way.
Was anyone out there successful in transferring data to a server using a TCP connection with a T-mobile prepaid SIM card?
No public wish lists :(
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