Read whole thread carefully, each word each line. Sometimes we skip some important part and may get error. But this guide (OP) helped everyone else. I think my english is fine, but if you are confused by any line let me know. Will correct it.
Before that I must know which variant and from which country your device is?
don't get me wrong but I'm no newbie and I used KDZ flash before with other phones so I know the drill (and the theory behind), I did not skip a thing, and to be correct I had to add a couple of actions in order to be able to launch the flashing procedure (Tool->B2C Client setup for example)
I read of many users with the same issue on other forums, I understand it worked for a lot of people but it does not for me, on 3 different systems
I will try a different method today, hope it will work
EDIT
btw mine it's a P760 v10c, TIM brand, Italian
well, le't see, I am able to get in flash mode with vol-up and usb plug , I see a couple of usb devices and a serial port IIRC, webserver online with right ports, hosts ok, run R&D test tool correctly, 3GQCT, EMERGENCY, select kdz, normal web update page, the first time I did it it told me to install B2C Client and I did it thru tool menu, went fine
Then I closed the client, re-run normal web server update, fill language and other info, and start flashing procedure
waited till it gets to 15% and no phone connected
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