Ever tried to replace the default sim that came with your iPhone 4 but not able to ? Well it is pretty easy to remove/change the sim card from your iPhone 4 and here we have a quick video and some illustrations to show you how to do it.
How to Remove iPhone 4 Sim Card Illustration
[ Image Credit]
Or if you are facing some problem understanding the illustrations, here is a quick step-by-step video on how to do it :
How to Remove iPhone 4 Sim Card Video