How to take the back off of an iphone?

I want to put my memory chip inside my iphone but, i don't know how to get the back off! Stupid i know but i don't know how!

You don't take the back off. The sim card is on the side if thats what you are referring to. Stick the end of a paper clip into the small hole next to the little drawer on the rt. Side, from the front of the phone.

IPhones don't have expandable storage.