1

No root needed, just install Boldbeast Recorder and go, following LG-G3 phones record calls very well.

LG-D855 (Europe)
LG-D850 (AT&T)
LG-D851 (T-Mobile)
LG-D852 (Canada)

2

LG-G3 Android 4.4.4, Android 5.0.1 please use these settings to record calls:
- Record Mode: 4
- Tune Audio Effect: No
- Tune Audio Route: Group3


LG-G3 Android 6.0.1 please use these settings to record calls:
- Record Mode: 1 or 5
- Tune Audio Effect: No
- Tune Audio Route: Group3

No root needed, it records calls very well in two directions.

3

LG V30: LG V30 Call Recorder
LG V20: LG V20 Call Recorder
LG V10: LG V10 Call Recorder
LG G6: LG G6 Call Recorder
LG G5: LG G5 Call Recorder
LG G4: LG G4 Call Recorder
LG G3: LG G3 Call Recorder
LG K10: LG K10 Call Recorder
LG G Flex2: LG G Flex2 Call Recorder
LG G Stylo: LG G Stylo Call Recorder