Before I picked up my new TL (Non-NAVI), I picked up a new T616 to go with the HFL (thanks mobilezen for the suggestion). People say that it sounds like I am in a tunnel, way far away from the microphone. The phone is new, but the firmware is old. I don't think that this should effect the sound quality. It sounds like the firmware upgrade will fix the signal strength problems.

I have seen posts about the microphone volume for the NAVI owners. Is there any way to adjust the volume in a Non-NAVI system? I seem to have to yell at the microphone even if the windows are up and the A/C is off. I have read posts from people praising the quality -- mine sounds like crap.

Any suggestions?