How to put a sim card in an iPhone 3GS?

I have a Samsung, originially as my phone. My sister recently got her upgrade to get an iPhone 4, so she gave me her iPhone 3GS. Last night, the touchscren on my Samsung stopped working, so I need to put my sim card into the 3GS. My sister and I don't know how to open up the iPhone to put my sim card into it. Don't suggest a paper clip because we don't have any over here. And also, it has to be pretty easy.

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At the top of the handset you'll see where the slot is for the sim card. Get a thin pin and push the hole that looks like a reset button, will need a hard push the whole sim cradle will pop out.www.scottishmobileservices.co.uk like us on face book.

Iphone use a different sim.card from a android. Iphone use micro sim cards. Android phones use regular sim cards.

Search in youtube. There are lots of video to do that