Guide

A guide to VoIP, the technology that lets you make voice calls over the internet

13 days ago   |   By Business Insider

VoIP, or Voice over Internet Protocol, is a type of internet-connected phone system.
Jens Domschky/Getty Images
VoIP is a system for transmitting voice calls over the internet.
IP phones use an internet connection rather than phone lines for transmission, but otherwise work the same as traditional phones, including using area codes and phone numbers.
VoIP can be substantially less expensive and more secure than traditional landline phones.
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VoIP is shorthand for a telecommunication technology called Voice over Internet Protocol, and...
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A guide to SIM cards, the small chips that connect your phone to a cellular network

13 days ago   |   By Business Insider

SIM cards are tiny chips stored inside many cell phones.
Tongchai Cherdchew / EyeEm/Getty Images
A SIM card, or subscriber identity module, is a small card in your cellphone that connects you to the network.
Your SIM card contains your phone number, and lets you make phone calls, send text messages, and more.
SIM cards have evolved over the years and come in several sizes, including mini-, micro-, and nano-SIMs.
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Most mobile phones rely on a small card called a SIM to make phone calls and send text messages. Without it, your phone...
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