Translation:You stayed out all night without calling.
I'm not a native French speaker either so I won't claim to have the definitive answer, but you're correct in that "appeler" does indeed translate to "to phone" or "to call (by telephone)".
The issue is probably just that Duo's English is predominantly American English and we don't generally say "he phoned me yesterday".
It's of course valid, though. Report it and hopefully they'll add it soon.
because appeler is a verb here. if it were "a call" (hence a noun) then it would have the article un/une (don't know which call is...mas. or fem. as I am a native English speaker and still learning French) and then followed by the form of appel(er) that means a call. There may not even be a form of appel(er) specifically that translates to a noun.
Hi Diana. You can't report it. There is no 'My answer should be accepted' option. Reporting errors is mostly ignored anyway. The only way I have succeeded in having errors or omissions rectified is to report directly to Sitesurf. She has been very helpful in this regard and has specifically said that she is happy to help.