Sony Xperia Z3, MXTP. Unlock bootloader? Help - Xperia Z3 Q&A, Help & Troubleshooting

Hi.
Can i someway unlock the bootloader without getting in to the phone settings?
It's protected by My Xperia it's take about 10 seconds before the Protectected screens shows.
I did a System recovery for a month ago and now it's only troubles.
Try to root with flashtool but its dosen't work Usb-debugging must be on.
I cant go to the developers settings in the phone because it's locked.
Anybodu have a solution on this? :crying:

I'm in the same position.

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I have a problem with My Sony Xperia Z3 dual (D6633) phone. When I am using my phone, it suddenly turned off and restarted, but it was stuck at the Sony logo and continuously restarting (boot loop at manufacture's logo). Cant get into recovery mode or nothing through my phone. When I googled I found Sony flash tool:
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developer.sony.com/develop/open-devices/get-started/unlock-bootloader/
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Please help me to unlock the bootloader ...
Thanks in advance
Hello....
Anyone there...?

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