Cell phone volume to low

Cell phone volume to low

I use an iPhone model Xs and people on the other side of the line complain about my voice volume being very low.
Is there a way to increase the volume? I never had any complains while driving my Lexus IS300.

Vawlkus | 8 februar 2019

Once the call connects, use the steering wheel volume control to raise it up.

Redmiata98 | 9 februar 2019

Actually, you can turn it up as the phone is ringing and it will connect at the higher volume. I do it all the time because I dislike the radio volume being to high.

wmyers | 19 februar 2019

Same for me. I stopped using Bluetooth with my X.