If you're looking to remove the SIM Card from your iPhone, please follow the instructions below.
Turn your iPhone off – See how here.
Locate the Sim card tray – find out where yours is by clicking here.
Locate the sim card removal tool within the box of your iPhone (Find pictured below). Alternative, use something like a paperclip or an earring,.
Insert the removal tool into the hole (See link on step 2 to find where the hole is on your iPhone), press down hard and the tray should pop out.
Carefully remove the Sim card from the tray.
To finish, insert the tray back into the phone and press down to close the tray.