What OS firmware version are you guys using?
At times the radio firmware in older builds of the BB OS is sub-par when it comes to the overall performance of voice quality.
Try updating your OS to the current firmware that your service provider offers (Verizon 4.7.0.148). If that is not enough you guys can always try out a new leaked version or hybrid OS build.
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cArL0s --CrackBerry
c@rL0$ -- Forum XDA
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