GPRS or Edge Howto?

Sure. Here is the output:

 _____                 _
|   __|___ ___ ___ _ _|_|___ ___
|   __|_ -| . |  _| | | |   | . |
|_____|___|  _|_| |___|_|_|_|___|
          |_| http://espruino.com
 1v79.19 Copyright 2015 G.Williams
>echo(0);
Connecting to sim900a module
["ATE0\r\n"
=undefined
] "A" <--- "A"
] "ATE0\r\n\r\nOK\r\n" <--- "TE0\r\n\r\nOK\r\n"
["AT+CPIN?\r\n"
] "\r" <--- "\r"
] "\n+CPIN: READY\r\n\r\nOK\r\n" <--- "\n+CPIN: READY\r\n\r\nOK\r\n"
["AT+CGATT?\r\n"
] "\r" <--- "\r"
] "\n+CGATT: 1\r\n\r\nOK\r\n" <--- "\n+CGATT: 1\r\n\r\nOK\r\n"
["AT+CIPSHUT\r\n"
] "\r" <--- "\r"
] "\nSHUT OK\r\n" <--- "\nSHUT OK\r\n"
["AT+CIPSTATUS\r\n"
] "\r" <--- "\r"
] "\nOK\r\n\r\nSTATE: IP INITIAL\r\n" <--- "\nOK\r\n\r\nSTATE: IP INITIAL\r\n"
["AT+CIPMUX=1\r\n"
] "\r" <--- "\r"
] "\nOK\r\n" <--- "\nOK\r\n"
["AT+CIPHEAD=1\r\n"
] "\r" <--- "\r"
] "\nOK\r\n" <--- "\nOK\r\n"
["AT+CSTT=\"pinternet.interkom.de\", \"\", \"\"\r\n"
] "\r" <--- "\r"
] "\nOK\r\n" <--- "\nOK\r\n"
["AT+CIICR\r\n"
] "\r" <--- "\r"
] "\nOK\r\n" <--- "\nOK\r\n"
null
["AT+CIFSR\r\n"
] "\r" <--- "\r"
] "\n10.47.223.198\r\n" <--- "\n10.47.223.198\r\n"
IP:10.47.223.198
["AT+CIPSTART=0,\"TCP\",\"http://www.pur­3.co.uk\",80\r\n"
] "\r\nOK\r\n" <--- "\r\nOK\r\n"
] "\r\n0, CONNE" <--- "\r\n0, CONNE"
] "0, CONNECT OK\r\n" <--- "CT OK\r\n"
["AT+CIPSEND=0,64\r\n"
] "\r\n> " <--- "\r\n> "
] "\r\n0" <--- "\r\n0"
] "0, SEND OK\r\n" <--- ", SEND OK\r\n"
["AT+CIPSEND=0,34\r\n"
] "\r\n> " <--- "\r\n> "
] "\r\n0, SEN" <--- "\r\n0, SEN"
] "0, SEND OK\r\n" <--- "D OK\r\n"
] "\r\n+RECEIVE" <--- "\r\n+RECEIVE"
] "+RECEIVE,0,289:\r\nHTTP/1.1 200 OK\r\nDate: Tue, 09 Jun 2015 11:07:06" <--- ",0,289:\r\nHTTP/1.1 200 OK\r\nDate: Tue, 09 Jun 2015 11:07:06"
] "+RECEIVE,0,239: GMT\r\nServer: Apache/2.2.14 (Ubuntu)\r\nLast-Modified: Fri, 15 Nov 2013 15:42:26 GMT" <--- " GMT\r\nServer: Apache/2.2.14 (Ubuntu)\r\nLast-Modified: Fri, 15 Nov 2013 15:42:26 GMT"
] "+RECEIVE,0,157:\r\nETag: \"c01036-d-4eb390b8a8d18\"\r\nAccept-Ran­ges: bytes\r\nContent-Length:" <--- "\r\nETag: \"c01036-d-4eb390b8a8d18\"\r\nAccept-Ran­ges: bytes\r\nContent-Length:"
] "+RECEIVE,0,86: 13\r\nVary: Accept-Encoding\r\nConnection: close\r\nContent-Type: text/plain\r\n\r\nHello World!\n" <--- " 13\r\nVary: Accept-Encoding\r\nConnection: close\r\nContent-Type: text/plain\r\n\r\nHello World!\n"
Response:  {
  "headers": {
    "Date": "Tue, 09 Jun 2015 11:07:06 GMT",
    "Server": "Apache/2.2.14 (Ubuntu)",
    "Last-Modified": "Fri, 15 Nov 2013 15:42:26 GMT",
    "ETag": "\"c01036-d-4eb390b8a8d18\"",
    "Accept-Ranges": "bytes",
    "Content-Length": "13",
    "Vary": "Accept-Encoding",
    "Connection": "close",
    "Content-Type": "text/plain"
   },
  "httpVersion": "P/1.1 200 OK\r\nDate: Tue, 09 Jun 2015 11:07:06 GMT\r\nServer: Apache/2.2.14 (Ubuntu)\r\nLast-Modified: Fri, 15 Nov 2013 15:42:26 GMT\r\nETag: \"c01036-d-4eb390b8a8d18\"\r\nAccept-Ran­ges: bytes\r\nContent-Length: 13\r\nVary: Accept-Encoding\r\nConnection: close\r\nContent-Type: text/plain\r\n\r\nHello World",
  "statusCode": "\nHTTP/1.1",
  "statusMessage": "200 OK\r\nDate: Tue, 09 Jun 2015 11:07:06 GMT\r\nServer: Apache/2.2.14 (Ubuntu)\r\nLast-Modified: Fri, 15 Nov 2013 15:42:26 GMT\r\nETag: \"c01036-d-4eb390b8a8d18\"\r\nAccept-Ran­ges: bytes\r\nContent-Length: 13\r\nVary: Accept-Encoding\r\nConnection: close\r\nContent-Type: text/plain\r\n\r\nHello World"
 }
--->Hello World
] "!\n\r\n" <--- "\r\n"
] "0, CLOSED\r\n" <--- "0, CLOSED\r\n"
>