[XPERIA X10 Android Development] romasalah:
FIRST OF ALL,i would like to thank the_laser for providing us with the tools http://xdaforums.com/showthread.php?t=1253277

I Noticed a lot of confusion here in the process of Unlocking BL -me was one of the confused- so please make sure to do/notice those points before/during unlocking procedure

THIS THREAD IS ONLY FOR CAUTIONS. actual steps are here http://xdaforums.com/showthread.php?t=1254087

THANKS TO 9Lukas5

IF U DON'T KNOW HOW TO USE FLASHTOOL FOLLOW http://xdaforums.com/showthread.php?t=928343

FOR GUIDANCE about SIM lock and which patch to use refer to 9Lukas5's thread and replies.

BUT generally use "qsd8250_semc" if ur phone came

1.pre-unlocked

2.unlocked by code

and use "qsd8250_setool2" if u have unlocked it with "setool"

ANYWAY u can always use the other patch if ur signal is lost after using the first.-i have less knowledge about this issue as my phone came pre-unlocked and didn't try to unlock another one-.

FIRST OF ALL

1.USB Port not broken -can't do any upgrade or unlocking with a broken one-.

2.enabled "unknown sources" from settings/applications

3.enabled "USB debugging" from settings/applications/development. -should display "USB debugging connected" in notifications bar after USB connection IF NOT: pls flash another ROM and root it using aZUZU method as UNlocking won't work for u-.

AFTER FLASHING downgrade aZUZU kernel

4.MAKE sure ur FLASHTOOL -GB ready version- recognize the phone after SE logo displays on ur phone -FLASHTOOL should say "xperia x10 connected" then shows ur busybox version.

5. IF it doesn't recognized ur phone pls...UPDATE ur SE PC COMPANION.

6.if u don't like to update PC companion..USE THIS METHOD as 9Lukas5 describes

7.be sure u have disabled all antivirus services and turn off ur firewall

8.close flashtool before starting to unlock BL

9.kill all processes named adb.exe by ur task manager "ctrl+alt+delete/start task manager/processes/sort by name/then kill adb.exe"

DURING UNLOCKING PROCEDURE

10.IF messages like "killing adb server..error" appears. pls make sure again u did points 6+7+8.

11.U HAVE TO WAIT A while and phone reboots in the process

DURING FLASHING Doom kernel v4.0 or stock

12. if messages like start flashing then abort flashing -with GB ready FLASHTOOL- or sending loader then along wait after flashing kernel .sin-with older FLASHTOOL - then u haven't probably unlocked ur BL . SO PLS don't bother ur self trying to re flash the kernel and check if ur bootloader is still locked

DID U follow steps+cautions?!!

13.to CHECK the status of ur bootloader pls download s1tool from

press "DO job" then connect ur phone in flash mode -green LED light-.

14. IF ur phone is UNLOCKED then status should be like this:

Welcome to S1 identify tool

TO CONNECT NEXT PHONES

X10 Xperia,E10 Xperia Mini,E15 Xperia X8,U20 Xperia Mini Pro

LT15 Xperia ARC,MT15 Xperia NEO,R800 Xperia PLAY

PRESS AND HOLD "BACK" BUTTON...

PLEASE ATTACH TURNED OFF PHONE NOW

RUNNING S1_EROM VER "r8A033"

NOTICE THE LOWER CASE letter "r" in "RUNNING S1_EROM VER "r8A033""

14.IF it isn't unlocked u would see UPPER CASE "R" like "R8A033" then try again with more caution then refer back to the thread

AFTER COMPLETEING THE PROCEDURE

15.of course u will see "XPERIA" Logo instead of "SONY ERICSSON" what Doomkernel u chose -v04b or v04-FS-.

16. 'SE' logo stll appears in cases:

1.u still on ur old kernel.

Or

2.u flashed Doom's stock kernel for unlocked bl.