Why is "Bu yeni telefonun özellikleri neler?" wrong please?
It is accepted now.
I don't think it is, can you please report as an alternative translation?
Thanks for your very quick reply on a holiday.
How do I get back to the sentence to report it please?
Oh, I'm not sure. You might come across it when you go through the lessons to strengthen the skill. I'll make a note of it though, so don't worry about it now.
Is "bu yeni telefonun özelliklerini nedir" wrong?
Yep! You added the accusative case (that extra -ni) on the subject of the sentence, which doesn't make sense :)