How do I do quotations on a mobile device on this forum?
How are you accessing the forum? If the site, it depends on your devices screen size and if it is in landscape or portrait mode.
assuming a phone in portrait mode, look for a button on the bottom of the post you want to quote that looks like 3 dots (depending on your device, it may render as a rather tall button) and tap quote. If you’re in landscape mode there should a button that says Quote, or just an image that looks like a quote mark.
This information is outdated for Discourse. Quoting posts works the same on mobile and desktop per the tutorial with discobot.