HTC Device Not Recognized Locked
I was having the same problem, and what solved it are the following steps:
1. Go to settings
2. Click on Developer options
3. Uncheck USB debugging (this was recommended in another forum)
4. I also turned Developer options off
5. Plug your phone back in
6. After I performed the previous steps, my computer installed device software, and once that was completed, the HTC Sync Manager recognized my device and allowed me to sync it.
Operating system Windows 7 with an i5 processor
Hope this helps.
Originally Posted by ez53436
Got a T-Mobile HTC One yesterday and I can't get the thing to be recognized by HTC Sync Manager. I've tried uninstalling it and reinstalling it tons of times, restarting the phone, restarting my laptop. Nothing works. When I plug in the phone, I get a drive that has a link to the HTC website to download Sync Manager, which I've done already. And if I turn off USB debugging, I get a message from HTC Sync Manager that says it's unable to recognise the device because it's locked (which is false).
Are there any sort of drivers that need to be downloaded for the phone? It seems unable to "mount" as a drive like my old Google G2.
Any help would be appreciated guys.
I have a MacBook Pro on 10.8.3.