Hello is a salutation or greeting in the English language. It is first attested in writing from 1826. The use of hello as a telephone greeting has been credited to Thomas Edison; according to one source, he expressed his surprise with a misheard Hullo. Alexander Graham Bell initially used Ahoy (as used on ships) as a telephone greeting.
The iPhone is the first smartphone model designed and marketed by Apple. It is the first generation of iPhone that was announced on January 9, 2007 after years of rumors and speculation. It was introduced in the United States on June 29, 2007, and it featured quad-band GSM cellular connectivity with GPRS and EDGE support for data transfer.
A telephone, or phone, is a telecommunications device that permits two or more users to conduct a conversation when they are too far apart to be heard directly.
A mobile phone is a portable telephone that can make and receive calls over a radio frequency link while the user is moving within a telephone service area.
A smartphone is a mobile personal computer with a mobile operating system with features useful for mobile or handheld use.
A touchscreen is an input and output device normally layered on the top of an electronic visual display of an information processing system. The touchscreen enables the user to interact directly with what is displayed, rather than using a mouse, touchpad, or any other such device (other than a stylus, which is optional for most modern touchscreens).