Connect to TCP server with cellular shield

Using Arduino Networking, Protocols, and Devices
8

hong89:

Try this ip: 74.125.227.127

It give me the same result as before.
=(

Hi, be careful of the order and meaning of the errors (google for them). CME error 28 means that the provider is not authorizing the connection, but CME error 4 is a sort of syntax error, and in your case is most likely due to the absence of the port number in the command. So

AT+SDATACONF=1,"TCP","74.125.227.127"

should be

AT+SDATACONF=1,"TCP","74.125.227.127",80