寻呼机

A pager, as worn on the waist to alert a person to a phone call or short text message. Popular in the 1980–90s before mobile phones, though still used by some medical and emergency personnel. Very occasionally used to represent alerts, digital communication, or nostalgia for old technology.

Depicted as a black device with operating buttons and a green screen displaying various numbers across platforms, including:

• Apple: 555-3215 (555 is commonly used for fake numbers in the US)
• Google: 1998 (the year Google was founded; previously showed 8888, the Google DNS IP address)
• Microsoft: [indecipherable]
• Samsung: 954-5684 (unknown origin; previously showed SUNMOON)
• WhatsApp: 867-5309 (an allusion to the 1980s hit song "867-5309/Jenny")
• Twitter: 40404 (Twitter's discontinued SMS number)
• Facebook: 543-4800 (Facebook Inc phone number; previously showed 02 04 20 04, referring to the company's launch date)