[Android Q&A, Help & Troubleshooting] wrysagar:
according to process i unlocked my boot loader of xperia soal and did flashed prerooted file named (prerooted_system.img) vai fastboot and was success.

after some days now i want to relock my bootloader of my xperia soal and i searched for solution. after all i got bootloader relocking file here at xda and did a process according to tutorial but unsuccessful.

while relocking bootloader it says

03/034/2012 09:34:57 - INFO - <- This level is successfully initialized 03/034/2012 09:34:58 - INFO - Flashtool Version 0.6.9.1 built on 2012-04-09 19:22:19 03/034/2012 09:34:58 - INFO - You can drag and drop ftf files here to start flashing them 03/035/2012 09:35:04 - INFO - Device disconnected 03/035/2012 09:35:13 - INFO - Selected MT27i_Sola__xperia.cz_relock_bootloader.ftf 03/035/2012 09:35:13 - INFO - Preparing files for flashing 03/035/2012 09:35:13 - INFO - Please connect your device into flashmode. 03/035/2012 09:35:20 - INFO - Device connected in flash mode 03/035/2012 09:35:21 - INFO - Opening device for R/W 03/035/2012 09:35:21 - INFO - Reading device information 03/035/2012 09:35:21 - INFO - Phone ready for flashmode operations. 03/035/2012 09:35:21 - INFO - Start Flashing 03/035/2012 09:35:21 - INFO - Flashing loader 03/035/2012 09:35:24 - INFO - Loader : null - Version : R5E003 / Bootloader status : ROOTED 03/035/2012 09:35:24 - INFO - Opening TA for writting 03/035/2012 09:35:24 - INFO - Flashing preset 03/035/2012 09:35:24 - INFO - Writing TA unit : [00, 00, 08, B2, 00, 00, 00, 02, 00, 00] 03/035/2012 09:35:24 - INFO - Closing TA 03/035/2012 09:35:24 - INFO - Ending flash session 03/035/2012 09:35:24 - INFO - Flashing finished. 03/035/2012 09:35:24 - INFO - Please wait. Phone will reboot 03/035/2012 09:35:24 - INFO - For flashtool, Unknown Sources and Debugging must be checked in phone settings 03/035/2012 09:35:25 - INFO - Device connected in flash mode 03/035/2012 09:35:26 - INFO - Device disconnected

after doing this relocking process, still my phone truns on and comes to useable mode, i mean in normal condition. so i doubt is my phone bootloader is re locked?

and when i try to flash official ( MT27i_6.0.B.3.184_Central Europe.ftf) or (MT27i_6.0.B.1.564.ftf) flash tools says

05/013/2012 14:13:13 - INFO - <- This level is successfully initialized 05/013/2012 14:13:14 - INFO - Flashtool Version 0.6.9.1 built on 2012-04-09 19:22:19 05/013/2012 14:13:14 - INFO - You can drag and drop ftf files here to start flashing them 05/013/2012 14:13:22 - INFO - Device disconnected 05/013/2012 14:13:26 - INFO - Selected MT27i_6.0.B.3.184_Central Europe.ftf 05/013/2012 14:13:26 - INFO - Preparing files for flashing 05/014/2012 14:14:14 - INFO - Please connect your device into flashmode. 05/014/2012 14:14:26 - INFO - Device connected in flash mode 05/014/2012 14:14:26 - INFO - Opening device for R/W 05/014/2012 14:14:27 - INFO - Reading device information 05/014/2012 14:14:28 - INFO - Phone ready for flashmode operations. 05/014/2012 14:14:28 - INFO - Start Flashing 05/014/2012 14:14:28 - INFO - Flashing loader 05/014/2012 14:14:31 - INFO - Loader : null - Version : R5E003 / Bootloader status : ROOTABLE 05/014/2012 14:14:31 - INFO - Flashing kernel.sin 05/014/2012 14:14:33 - INFO - Flashing fotakernel.sin 05/014/2012 14:14:34 - INFO - Flashing modemfs.sin 05/014/2012 14:14:35 - INFO - Flashing partition-image.sin 05/014/2012 14:14:35 - INFO - Ending flash session 05/014/2012 14:14:35 - ERROR - ERR_SEVERITY="MAJOR";ERR_CODE="0076";ERR_DYNAMIC=" failed to set ta config"; 05/014/2012 14:14:35 - ERROR - Error flashing. Aborted 05/014/2012 14:14:35 - INFO - Device connected in flash mode 05/014/2012 14:14:37 - INFO - Device disconnected

dont know what is going on? and happens same time and again.

really i need help guys and now i m unable to flash or install official update. Please help me..