hey ^^
first, i wanna know if there's a difference in what i can do between gsm shield and the gsm module ?!
..
the other thing, i saw some videos about gsm shield and all of them was about sending and receiving texts and making calls ; what i wanna know is : can i -like in bluetooth module- send a letter or number to the arduino from my mobile and depending on the text that will let's say turn led on ?!