SIM cards have become a universal aspect of modern smartphone usage, but the technology and meaning behind the name dates more than three decades.

To remove the SIM card from your iPhone, all you need is a SIM card ejection tool or paperclip. Sticking the ejection tool into your iPhone's SIM card tray will remove the card. Your iPhone's SIM card ...

This transcript was prepared by a transcription service. This version may not be in its final form and may be updated. Zoe Thomas: The last time you switched cell phone carriers, you might remember ...