VoIP (Voice over Internet Protocol): A method for taking analog audio signals, like what you hear when you talk on your phone, turning them into digital data that can be transmitted over the Internet.
Cellular Technology: Refers to technology used in cellular communication networks which allows mobile device users to connect with each other via wireless networks.
Smartphone Evolution: Describes how smartphones have developed over time – from basic devices capable of making calls and sending text messages to advanced devices capable of performing tasks previously only possible on computers.