When I use the example sketch and open the serial monitor I cant get past seeing this message, "SMS Messages Sender".
Troubleshooting:
I can successfully get my Arduino Uno to blink so I know that much works.
I know the sim is activated with AT&T and works because I tested it there with them at the store.
The sim card does not use a PIN so leaving the pin blank should work.
I waited over 10 minutes a few times waiting for the shield to initialize.
The GSM library included with the arduino.cc IDE doesn't currently support the GSM Arduino Shield 2 because that is an arduino.org product. The GSM library included with the arduino.org IDE does support your shield. So you can just use the .org IDE(Arduino - Home), or you can download their IDE and then just copy the GSM library from it to your {sketchbook folder}/libraries folder and continue to use the .cc IDE. If you want to do the latter and need more instructions let me know.
This sort of confusion should soon be over with since the two companies have negotiated to merge back together.
I used your link to install the arduino.org IDE 1.7.11 and uninstalled the IDE from arduino.cc
I immediately noticed the difference when starting the arduino.org IDE 1.7.11
I went to File >> Examples >> GSM >> Send SMS
Once the sendSMS sketch was open then I checked the port with Tools >> Port >> COM3(Arduino Uno)
Next I verified the sketch and once it was complete I uploaded the sketch without any errors and opened the serial monitor and set the drop-box to both NL and CR. I still couldn't get past the "SMS Messages Sender" message. I tried a few more times waiting for the shield to initialize for about 10 minutes each time. I also tried to see if importing the GSM library would help by going to Sketch >> Import Library >> GSM.
I tried it with the added library at the top but still couldn't get past the "SMS Messages Sender" message.
