I want to ask a question about the 42 but I cannot using my Android phone

[Jim Clark]

It turns out that when you bring up this site on your phone, you need to be viewing this page as a "desktop site". 

Then when you hit the "hamburger" at the top left, at the top of the side bar that appears

"+ New conversation" is the option to select.

[Thomas Okken]

I have noticed a similar issue when trying to post on my iPhone. I have to hold it in landscape mode in order for the "New conversation" and "Reply all" / "Reply to author" / "Forward" buttons to appear. But apparently the landscape trick does not work in the Android browser.