Hi,
I hope you guys are talking about the same module, I am planning to buy one.
http://www.ebay.com/itm/SIM900-GSM-GPRS-Shield-Module-Development-Board-IComSat-kit-for-Arduino-/300792139252?pt=LH_DefaultDomain_0&hash=item46089bcdf4
One question, I couldn't find how to power the module, does it take power from Arduino as it looks like a shield?
Just wanted to confirm before I place the order.
I will be using it with Arduino Duemilanove (which is almost like Uno).
Thanx.