MDBT42 http module using sim808

I'm not sure the module itself contains a method, but if you know the AT command you send it's easy enough to add one - the code itself is in https://www.espruino.com/modules/SIM900.js

For example:

// there is already a getVersion function, but you can see how you might change it
gprs.getVersion = function(callback) {
    this.at.cmd("AT+GMR\r\n", 1000, function(d) {
      callback(null,d);
    });
  },

If you don't want to/can't change it, does getIP not work? I guess if there is no connection you won't have an IP?