He probado con otro cable USB y me sale esto cuando intento flashearlo.
25/033/2012 15:33:28 - INFO - <- This level is successfully initialized
25/033/2012 15:33:29 - INFO - Flashtool Version 0.7.0.0 built on 2012-04-14 11:34:01
25/033/2012 15:33:29 - INFO - You can drag and drop ftf files here to start flashing them
25/033/2012 15:33:34 - INFO - Device disconnected
25/033/2012 15:33:40 - INFO - Selected LT18_4.1.A.0.562_IBERIA.ftf
25/033/2012 15:33:40 - INFO - Preparing files for flashing
25/033/2012 15:33:52 - INFO - Please connect your device into flashmode.
25/034/2012 15:34:26 - INFO - Device connected with USB debugging off
25/034/2012 15:34:26 - INFO - For 2011 devices line, be sure you are not in MTP mode
MTP mode?