Literally ALL of these questions can be answered with Wikipedia. Thanks for your helpful comment on #3. Also people and businesses still use landlines.
Response to 30 Easy Steps To Not Give A F#@k:
While Finn usually also doesn’t giveafuck, #3’s quote is from Jake, not Finn. Should be pretty easy to fact check.
Sorry, but how do you misquote text that is literally right below it in the picture for #1? “They just don’t sing” hasaVERY different meaning than “they don’t just sing”.