If he gives access to his contact list, yes. But I can't see a situation in whic...

SaintSal · on Feb 1, 2015

They've introduced an optional feature that records media around you. Based on their past record of changing defaults, I think it's a reasonable possibility that this feature will be turned on by default in the future.

Silhouette · on Feb 1, 2015

But I can't see a situation in which Facebook turning on a mike to record conversations is not a huge violation of privacy.

Do they do that?

FYI, this is mentioned in the article. It also linked to this article on that specific issue:

http://www.forbes.com/sites/kashmirhill/2014/05/22/facebook-...

Short version: It's not as simple as "they record all your conversations", but yes, they can and do turn on your phone's mic.