Ejecting the SIM card
Unlike most other mobile phones, you can't open the case to replace the battery or access the SIM card. The SIM card is held by a small holder in the top of the iPhone.
To remove the SIM card, insert a paperclip or other thin, round tool into the small hole on top of the iPhone.
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Bill Detwiler is Managing Editor of TechRepublic and Tech Pro Research and the host of Cracking Open, CNET and TechRepublic's popular online show. Prior to joining TechRepublic in 2000, Bill was an IT manager, database administrator, and desktop support specialist in the social research and energy industries. He has bachelor's and master's degrees from the University of Louisville, where he has also lectured on computer crime and crime prevention.