It is a shame that Motorola build such a great phone, but no driver for it.  The Motorola Phone Tool software 4.0 does not support this phone. Go through live Internet update to version 4.35, still no driver for it.  Tried Motorola web site, there is no driver download for this phone. Contacted Motorol support, they say they setup a special support line 800-972-1837 for this KRZR phone.  Called that number and opened case with them.  Three days later, on the phone with their support engineers and managers for over 10 hours, still could not get the driver.