Hi, I have a Z1 with the upgaded software 2.0. I paired the LG VX8350 with the unit and was getting the real bad echo sound, i followed the insructions posted and fixed that problem. Everything sounds great but only when sitting still. When i try to make a call while i'm driving it seems like my signal strength gets real weak, calls break up & come back or drop completely. Basically, while i'm driving a havn't been able to complete a call where i can here the other party clearly. I've been testing around my house where signal strength is normally fine. When i disconnect my phone from bluetooth and make calls in the same area call quality is perfect. Just wanted to get some opinions on this???