Thank you for great video.
I wish you see this comment because I have been trying to connect two shields to Arduino Mega ADK. (GSM/GPRS + GPS).
I am receiving the data from GPS shield and sending them to SD_Card but when I add SMS and voice call to the code, the delay for these two functions causes problem.
My aim is to send the data from the GPS shield which successfully being logged on SD card to my mobile phone via SMS.
I find you videos very useful and clear.