One review of it says
“Doesn’t actually record the other end of the call (unless volume is up high on speaker). It’s just a regular sound recorder that switches on when you make a call.”
That so or no?
Go into settings. Lots of options. There are lots of controls, maybe too many. I changed several of them and that seems to have fixed the problems. One option is on the volume of the other party you are talking to.
I’ll let you know how it is working in a few days.