MurrayJimW

I second the downgrade instruction request. Obviously someone on here accomplished it and I have all the old files, but I can't get the unit to do a thing. It's ignoring my SD card with the older firmware. I read in a previous post regarding different equipment that you needed to change the file containing the firmware version to a larger number, but the file referred to in that post is not present on the Z1xxx firmware as far as I can tell (MPU.bin). Any help would be greatly appreciated. As it stands, the unit tries to take me anywhere from a few miles to hundreds of miles out of the wa

Same problem here. I just installed my 90bt and it has never made a call with a voice command. It understands call but never a name - just keeps telling me to say the name or number of the person I wish to call. My audio is also practically useless from the other end too. If you get within a couple of inches of the mic it will work, but obviously this is not an option. I have also tried the upgrade with no change and I too am using an iphone 3g (tried a razr with the same result). Thanks for any help you guys might offer here....