1

Is there a volume control as can hardly here the other person, but can here myself perfectly

2

If your voice is good but the voice of your friend is weak or silent in recordings, you should
- Switch on the loudspeaker during a call, so Boldbeast can record the call on both sides normally. Or
- Root the phone, so Boldbeast can fix it completely to record calls on both sides perfectly without switching on the loudspeaker.
There is no other solution on the whole market unfortunately.