I have stacked the SM5100B shield on the Uno and I'm using a 9V battery to power the board due to the extra current to send each message.
And I'm using the wimpiest possible battery for extra current. Pretty damned funny.
Serial.print("AT+CMGF=1"); // set SMS mode to text
Serial.print("AT+CMGS="); // now send message...
Serial.write(34); // ASCII equivalent of "
Serial.print("15557771212"); *not my actual phone number*
Serial.write(34); // ASCII equivalent of "
Which pins did you connect the phone to? I don't think the serial monitor is going to answer...
do // You don't want to send out multiple SMSs.... or do you?
Then why the hell is this code in loop()?