Aquí dejo los logs por si tenéis alguna idea.
18/026/2014 17:26:30 - INFO - Device connected in flash mode
18/026/2014 17:26:31 - INFO - Opening device for R/W
18/026/2014 17:26:31 - INFO - Reading device information
18/026/2014 17:26:31 - INFO - Phone ready for flashmode operations.
18/026/2014 17:26:31 - INFO - Current device : C1905 - YT910NLW8H - 1274-5576_R2C - 1272-2325_15.4.A.1.9 - WORLD-i_15.4.A.1.9
18/026/2014 17:26:31 - INFO - Processing loader.sin
18/026/2014 17:26:31 - INFO - Checking header
18/026/2014 17:26:31 - INFO - Flashing data
18/026/2014 17:26:31 - INFO - Processing of loader.sin finished.
18/026/2014 17:26:31 - INFO - Loader : S1_Root_dbe9 - Version : loader_MSM8X30_10 / Boot version : S1_Boot_MSM_8227_5 / Bootloader status : NOT_ROOTABLE
18/026/2014 17:26:31 - INFO - Start Reading unit 000008B2
18/026/2014 17:26:32 - INFO - Reading TA finished.
18/026/2014 17:26:32 - INFO - Ending flash session
18/026/2014 17:26:32 - INFO - Your phone bootloader cannot be officially unlocked
18/026/2014 17:26:32 - INFO - You can now unplug and restart your phone
18/026/2014 17:26:32 - INFO - Device connected in flash mode
18/026/2014 17:26:33 - INFO - Device disconnected