Cseries :: C2-00 VERY Weak Sound On Parrot CK3100 Car-kit Speaker

I DON'T want anything but NOKIA for my too-many-sim-problem (4 phones carrying at this time!).Bought C2-00 recently hopeing that I will be happyer with my 2 bussines number's (from 2 countries) being able to conect to Parrot CK3100 car-kit. But happines was premature, since C2-00 was unable to deliver decent sound level (I CAN NOT HEAR WHAT PEOPLE ON THE OTHER SIDE OF PHONE CONNECTION R SAYNIG!, changde first C2-00 for another one, also bought sim-free with original Nokia 2-year warranty) thru pre-built-in speakers in my Skoda Octavia. But in exactly same car with exactly same car-kit with exactly same settings and exactly same volume level my Nokia X6 or my Nokia N8 or my Nokia C5-00 deliver flawless volume level coming from people I'm talking to.

Btw same two C2-00 also delivered VERY -VERY poor volume level thru earpiece-speaker, and when I turned d volume up it was like my speaker-phone was ON (which in every situation was not) - everybody around me could clearly hear what was the other person whom I was talking to said.