I have a CX5500 that is currently running UC version 126.96.36.19987 and Device version 188.8.131.52255 and am having trouble upgrading the devgice software to 1.3. I tried upgrading via USB and it recognizes the thumb drive, but the phone then asks me ti sign in. It will not accept the admin password and just sits there. No matter what I put in the for the password, I hit enter and nothing happens. If I hit Cancel nothing happens as well (I know it is recognizing the button rpesses because I see them flash and I can change the mode). I factory reset the phone and tried it before anything was set up and got the same thing. I haven't been able to find any references to any type of sign in before you can upgrade the device, it is just supposed to recognize the USB and do the install. Is there something I'm missing somewhere? Does anyone have any ideas on what is going on here? Thanks.
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I finally got it to work. While the hosted server still said I was up to date with 1.2.3, I managed to get the USB to work. You must enable the phone lock option apparently for it to work. Once I enabled that (and rebooted) it recognized the USB and installed the update.