With Online AT Command Tester tool, you can test Simcom TCP/IP feature.
You can also send commands to set up TCP/IP connection in the ‘Script Mode’ tab of the AT Command Tester,
//Check the registration status
//Check attach status
//Attach to the network
//Wait for Attach
//Start task ans set the APN. Check your carrier APN
//Bring up the wireless connection
//Wait for bringup
//Get the local IP address
//Start a TCP connection to remote address. Port 80 is TCP.