XZ bootloop after Oreo update, Xperia Companion's repair don't work - Sony Xperia XZ Questions & Answers

Hi,
My dad recentely upgrade his XZ, but it didn't work and the phone is in bootloop. So I try ti use Xperia Companion to repair it but pass 10% there is a error message and it can't go further...
So my question is can i make a factory reset using a Stock firmware with Flashtool without loosing the TA partition ? (the phone is full stock so the bootloader is lock and my dad want to keep is waranty) (I try some researches but i didnt found any answers about flashing a stock rom with flashtool, all i found is how to flash a custom rom)
Thx,
Valentin

Flashing a FTF will do nothing to the TA partition. You are safe to proceed

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[Q] Flashing Stock ROM on Sony Xperia L - C2105

I have Sony Xperia L - Jellybean 4.2.2 - 15.3.A.1.17 - Rooted Stock ROM - Locked Bootloader
For some reasons I have to make a hard factory reset with Sony Update Service program, but instead of letting the program re-download the firmware then installing it on the phone, I already made the FTF file that I downloaded in the past by using the Flashtool.
Now The Question Is:
Have I worry about losing the DRM Keys when I flash this FTF with the Flashtool ?, or this kind of flashing will not affect it ?, or I have to check Exclude TA in the Flashtool ?
Hey , anyone please help me

Xperia L FTF

Got custom rom and kernel, bootloader is unlocked, and i am rooted. If i flash ftf will everything be fine? I mean will i be stock again (which means my guaranty is back again)? I found those ftf's http://forum.xda-developers.com/xperia-l/general/sony-xperia-l-flashable-ftfs-locked-t2560642 . Guys i dont really know what should i choose. I got C2105 xperia l. Thanks in advance
Yes, you will be on stock again. If your phone ends up in a bootloop, then you also need to do a factory reset. Pick the ftf for your own country, if available.
If you want to make use of your guaranty, you'd better relock your bootloader.
I would like to add that just relocking the bootloader won't get your warranty back. For that you must restore your TA partition.
Thanks guys

[Q] flashtool problem

since that I asked a question about rooted
but I still don't want to unlock bootloader
so I try to flash it back to 4.3 jellybean
I tried many times but everytime after I flash the ftf it goes into a bootloop
what happen? do I need to wipe data and cache?
or I need to upgrade my flashtool?
Moreover could someone upload me a pre rooted ftf?:good:
Download fastboot and ftfs from mega

REBOOT LOOP after trying to downgrade xperia z3 D6603 HELP!!!

Well I just tried to downgrade the firmware of my xperia z3 D6603 using marshmallow into a 23.0.A.2.93 firmware in order to then root it.
I downloaded this firmware: http://oceanhost.eu/d7iuzncelhpr/D6603_23.0.A.2.93_Generic_20GLOBAL.ftf.htm
I found that link in here: http://forum.xda-developers.com/z3/general/guide-rootrecovery-how-to-root-install-t3017056
Then I followed this intructions: http://forum.xda-developers.com/z3-compact/general/how-to-root-backup-drm-keys-t3013343
In the end, flashboot had some warnings and then finished. Now my phone is constrangly rebooting. I can't even turn it off. Just keeps like that so I donĀ“t know what to do.
BTW: in the prossess I got a message saying: "A FSC script is found: default.fsc. Do you want to use it?" and I hit yes.
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If you want to downgrade, you MUST WIPE EVERYTHING before downgrade!
Try reflash back the firmware you using before, also try don't wipe anything.

need help restoring docomo xperia z5 so-01h

hello, im wrongly flash file(kernel?), and now my phone shows as e6653 at flashtool..
phone condition:
1.can boot to twrp,flash,adb mode
2.wont load custom rom(stuck at rom logo)
had tried :
1. companion, missingphoneinfo error
2. flash stock so-01h, this bundle not for your phone, also error with e6653 firmware
3. extract kernel from so-01h firmware, but flash error
dtb not found
please,any solution guys?
no one at here have setool box
:crying:
Get Flashtool 0.9.22.2
Download So-01H FTF available on experifirm
Flash the FTF
TWRP and root will be gone but you will have a working phone wit stock MM
I tried this and worked. Nothing else worked for me. No custom roms or Nougat ftf from anywhere.
If you found any way to install custom roms please let me know too.
Thanks

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