i doubt they can. i don’t have a smartphone. plus i don’t do any of that kind of stuff from that phone. plus it’s always off unless i am talking to someone, which is almost never.
The NSA has been shown to be grabbing phone calls after they are on the network - where you can do absolutely nothing about it - other than to never have a phone conversation with anyone for the rest of your life ... :-) ...
It’s also been reported that they can go back (in history) and listen to calls before - not just “live”.
It’s fairly extensive what they can do and it’s definitely not limited to “computer” phones - but regular ole home phones or pay phones (if there are any still around).