bluetooth car connection, poor quality

[emmanuel_barrau]

ZF Model: ZC520KL
RAM: 2G
Firmware/APP Version: OPM1.17019.011.WW_Phone-15.2016.1811.502-1
Frequency of Occurrence: every time
Rooted: No
APP Name:

Hello, with oreo 8.01 bluetooth sound quality is very very very poor while a call using car bluetooth connection. we try with 2 recent cars (april and december 2018, peugeot and skoda) the problem is the same. we try with other phone without any problem: zenfone 3, iphone 6, xiaomi .... we try to remove connection between car and phone, swipe the phone.... please help.... thanks

[ServiceE_Asus]

Hi emmanuel.barraud, Good day. Could you kindly show me more details about this matter as below? (1.) Bluetooth device model and system version (2.) A short video about this poor quality Thank you.