downgrade XZ1 701SO Softbank bootloader locked

[Lost149ers]

I really need help, sugestion, tutorial or whatever to downgrade my xz1 701SO from pie to oreo
Bootloader locked
Already have the oreo ftf for it
Already followed so many tutorial for it

Its the flashtool app
Already tried many flashtool (15) but none couldnt read the device. There was no option to option for xz1 701SO but the other xz1 variant was on the list
All drivers installed perfectly, even i can use adb to disable some bloatware

This is my only device for daily driver n i spent all my saving for it. Cant afford send it to service center.

PLEASE, I NEED HELP

 

[TEK023]

hey Lost149ers
have you ever do a research on google ? how you enter xda site
all you need is newflasher extract firmware into newflasher folder delete all *.ta file
and flash the firmware

here for example
https://www.youtube.com/watch?v=Bf2xuv1gTPY&t=132s

 

[Lost149ers]

hey Lost149ers
have you ever do a research on google ? how you enter xda site
all you need is newflasher extract firmware into newflasher folder delete all *.ta file
and flash the firmware

here for example

&t=132s

I did my research, n yes i missed that part what newflasher really for. N i didnt found that video tutorial on youtube. I been to much panic n focus to flashtool n wby it cant recognize 701SO, I installed the newflasher but didnt understand what to do in the first time.

Im sorry for my noob post. N THANKS FOR UR HELP n UR PATIENTLY ASSISTANCE SIR

i will try it soon n report back here

 

[Lost149ers]

hey Lost149ers
have you ever do a research on google ? how you enter xda site
all you need is newflasher extract firmware into newflasher folder delete all *.ta file
and flash the firmware

here for example

&t=132s

I got bootloop
I folllow all the instruction

 

[TEK023]

try this one make sure you download your own model firmware
https://www.youtube.com/watch?v=dp9zkp0rR0M&t=255s

 

[Lost149ers]

try this one make sure you download your own model firmware

&t=255s

I dont know why oreo rom for 701SO xz1 softbank difficult to find, i googled n found just 2, n i tried em all.
At first attempt, SOCM FLASH were not in USB section on device manager, after uninstall - restart - reinstall again, 3rd attempt was succesful, its in USB section. So i start to extract the ftf, delete .TA n persist-x.sin, extract the newflasher in he same folder, execute it, no sign its flashing n i unplug it, restart it, bootloop

 

[Lost149ers]

try this one make sure you download your own model firmware

&t=255s

Tried it 20 times
Still cant flash from newflasher
I spent 3 days for this

Maybe i should give up

 

[TEK023]

tried hold volume up + power button if the phone restart
and after that hold down volum button to enter flash mode
uninstall flash mode driver and install it back just whatever try it will just work

 

[Lost149ers]

Still cant

Its okay Sir
I really appreciate all ur patience n advises
Spent so many days for this Bricked 701SO
Now i dont have smartphone n need to borrow my friends phone to reply this

Will be my last xperia to buy

Have a good day

 

[TEK023]

if your device bootloader is locked
there will be no way that your phone is hard brick it's only soft brick
try to find solution buy playing with buttons so you can enter flash mode
check cable and usb port too

 

[Lost149ers]

if your device bootloader is locked
there will be no way that your phone is hard brick it's only soft brick
try to find solution buy playing with buttons so you can enter flash mode
check cable and usb port too

First, thanks for not givin up on me
Yesterday my friend lend me an EDL cable with dongle, i dont know how or why, i plug it n it can turn my 701SO to flashmode, n i checked in device manager on port sub it shows SOVC port
So i Tried to flash the oreo ftf, many times, but failed. So Pie is the only i can get
It booted. Done
After an hour checking it to make sure no failure. I tried to flash the oreo ftf, but again the device manager read the SOVC not in the port section, newflasher always shut down everytime i tap enter, many times

Maybe i should stop tryin Unlock n root this device.
N stay with stock Pie. At least it can be use again.