gms shield arduino sim900

hello all. i got problem for connecting my arduino uno to my gsm shield..i want to ask what is the standard connection must connect to uno since this shield has a lot of pin XD...my project just want to send sms when the button being push...

i want to ask what is the standard connection must connect to uno since this shield has a lot of pin

If it is a shield, it simply plugs in. Why are you not simply plugging it in?

because in the datasheet there are lot of interface like gpio,uart,iic &pwm,debug_port..i just cant understand it...do i need to connect all this pin..

Post a link to the device in question.

http://iteadstudio.com/store/index.php?main_page=product_info&cPath=18&products_id=413
http://iteadstudio.com/store/images/produce/Shield/IComSat/icomsat_DS1.2.pdf

here sir

It's a shield. It fits exactly one way. When properly installed, all the required connections are made.