What app is used to record sounds on LG k10?

I just spent an hour on the phone with customer service... where my issue was escalated to a floor manager, who promised me that he'd call me back from his own office in 2-5 minutes. That was 30 minutes ago... On December 2, 2016 I added a line to my account for my daughter. Even though EVERYONE els

I have recently began recieving a + sign on my on my wifi icon and I read that it means that my calls are being sent through my wifi calling featire but I havd turned that off yesterday and it still not highlighted Does it work no matter what after its activated