How to replace a SIM card in iPhone?
1. Locate the SIM card holder on your iPhone. On the top of your phone, there are 3 ports. One is for headsets, one is the power switch and the longer, oval one in the middle is where your SIM card is stored. Note the little hole at one end of this panel. 2. Unfold a paper clip and insert the end of it into the hole in your SIM card panel. Once you insert it, the panel pops out of place and you can fully remove the tray holding the SIM card from your iPhone. 3. Remove your SIM card and replace it with a rented one. The tray is designed to hold your SIM card in a specific direction, so you can’t insert it incorrectly. Reinsert the tray holding the new SIM card into your iPhone, and slide it in until the panel is flush with the outside of your iPhone. NEWER USE FORCE TO INSERT THE TRAY BACK!