Originally Posted by iamsamsamiam
I'm assuming you were just unable to use the flashtool correctly or the flashtool didn't detect your device and you hit a wall. I'm pretty sure you have to get into bootloader mode to get the flashtool to work correctly which involves shutting down the phone (using the hard off button if you have to) and turning on the device by holding volume down and power until the phone vibrates 3 times or something. The device screen should still be blank (black) but the LED indicator should have changed colours (I'm thinking red but his is off the top of my head). From here when you plug in the USB the flashtool should detect your device in which you flash the ftf file.
Flashtool is super easy to use, it tells you what you need to do, and I did all that, it just didn't work for me is all.
I have since flashed the leaked version of 4.4, using the ftf from the flashtool site, and then just rooted that.
No idea what went wrong with this pre-rooted version since it works for a lot of people and should have worked for me as well. But it doesn't matter, since I'm now at pretty much the same level.