need advice about bluetooth issue

sonic370

ok iv'e had two different bluetooth units both considered good units.
a jvc and a pioneer. but on each the in coming telephone calls suck
everyone says on my end the sound is awful. i can here them great.
iv'e tried moving the mike around and that didn't help. is it a after market
thing or what. iv'e been in other cars with stock hands free and they sound
just fine. even playing songs using the bluetooth feature doesn't sound as
solid as using the iphone's cable. sorry to rant just wondering if anyone else
has been thru this...............