I know this post is pretty old, but still I'm struglig the second day now to get into flash mode and still no luck despite trying every method there is on the web.
I've got Xperia X10i mini pro, reinstalled standard ROM with PC companion just to make sure it's nothing with the software or any modifications I made to it.
I'm guiding myself with instruction given here:
in order to get my bootloader unlocked
what I've done so far:
-installed Android SDK incl. SDK Tools, SDK Platform-tools, Google USB driver package. Not installed any API from SDK.
-put android_winusb.inf (18 KB size) in C:\android-sdk-windows\extras\google\usb_driver
-in general- everyting given here: wiki.cyanogenmod.com/wiki/Howto:_Install_the_Android_SDK#Windows
List of devices attached
in my opinion meaning it works as it should.
So I turn the phone off, unplug the cable both from computer and the phone, take the abttery out, plug both end of USB cable where these should be, hold the Back button (tried with Volume up too) and put the battery in.
The result is it only goes into flash mode for several seconds (confirmed by SuperOneClisk log) and then goes into charging mode. nothing gets displayed on the screen. Only when PC Companion is on it detects it, than looses it and pops up with a window on how to properly connect the device... :/
So can someone please tell me what I do wrong?
Why it doesn't stay in flash mode?
PS. when I enter *#*#7378423#*#* to access the service menu, after pressing the last * the numbers just disappear and nothing happens...
I somehow got around that with s1tool and Flashtool. But eventually I could not go along the way given at cyanogenmod.com and unlocked with the help of this: http://forum.xda-developers.com/show....php?t=1254225