How do I enter these from an iphone? Or should I just let my laptop output the dtmf tones?

I'm def. gonna try this out. I usually pres & and # a couple of times, because it often skips the useless menus and takes me to a person

Historically, you whistled them (https://en.wikipedia.org/wiki/Phreaking), or you bought a hardware ‘whistle’ from the likes of Steve Jobs (https://en.wikipedia.org/wiki/Blue_box)

If you can whistle two tones simultaneously (the D in DTMF means dual), I'd love to hear it.

https://youtu.be/jAG3fQpeZtU (not me)

> should I just let my laptop output the dtmf tones?

Yes. Depending on your OS, it might even have the sound files:

https://osxdaily.com/2016/03/31/play-dtmf-tones-mac/

Cool!, but that doesn't include ABCD.

https://pbxbook.com/other/dtmftone.html does. I'll try a company I know takes at least 40 minutes usually :

Also, something that annoys me about VOIP is that they don't take into account the different tones in different regions. Here in the Netherlands we use 425Hz fo dial tone etc. It always feels very emulated because it's a different tone.

I've found pressing 0 or 1 usually works too