Develop Bugs

Xperia Acro......root? unlock? fastboot? anything?

Hey guys,
Just picked up the Japanese Xperia Acro with au/KDDI in Japan. From what I gathered, the phone is almost exactly the same as the Xperia Arc, only difference in name, so I felt it'd be best to post here.
Anyway, great phone, but I'm desperate to root it and then overclock the processor. Thing is, it's branded with the carrier, so I'm unable to access fastboot loader. (Holding menu and plugging in usb doesn't trigger blue light)
Considering this is my first Android phone, I'm literally stuck on where to go from here. Is it impossible for me to root this phone and load custom firmware due to it being locked with the carrier? Am I really stuck with an untinkerable phone?
Appreciate your help guys...

I can unlock your bootloader remotely and enable fastboot for you
The process uses testpoint which is in a different position from the Arc

Jinx13 said:
I can unlock your bootloader remotely and enable fastboot for you
The process uses testpoint which is in a different position from the Arc
Click to expand...
Click to collapse
Sounds good!
How can I arrange this?

Hi Jinx13. Would you be able to remotely unlock the bootloader on my Xperia Arc? I've tried searching through forums for the past couple of days to unlock the bootloader but can't manage it. I'm with Rogers Canada, I unlocked the sim and debranded the phone (I think).
Thanks.

pete_xperia_arc said:
Hi Jinx13. Would you be able to remotely unlock the bootloader on my Xperia Arc? I've tried searching through forums for the past couple of days to unlock the bootloader but can't manage it. I'm with Rogers Canada, I unlocked the sim and debranded the phone (I think).
Thanks.
Click to expand...
Click to collapse
Yeah sure contact me via PM
Sent from my LT15i using xda premium

Jinx13 said:
Yeah sure contact me via PM
Sent from my LT15i using xda premium
Click to expand...
Click to collapse
Excuse me. could you advise if the tool "SE Extreme Tweaker for ALL 2011 Models" can be used for au IS11S acro?
There was same question in the thread but there is no answer.
http://forum.xda-developers.com/showthread.php?t=1356253

gpx606 said:
Excuse me. could you advise if the tool "SE Extreme Tweaker for ALL 2011 Models" can be used for au IS11S acro?
There was same question in the thread but there is no answer.
http://forum.xda-developers.com/showthread.php?t=1356253
Click to expand...
Click to collapse
Sorry I cannot comment on that as I do not know.
Jinx13

Sony Ericsson Xperia acro IS11S Au KDDI
cphil19 said:
Hey guys,
Just picked up the Japanese Xperia Acro with au/KDDI in Japan. From what I gathered, the phone is almost exactly the same as the Xperia Arc, only difference in name, so I felt it'd be best to post here.
Anyway, great phone, but I'm desperate to root it and then overclock the processor. Thing is, it's branded with the carrier, so I'm unable to access fastboot loader. (Holding menu and plugging in usb doesn't trigger blue light)
Considering this is my first Android phone, I'm literally stuck on where to go from here. Is it impossible for me to root this phone and load custom firmware due to it being locked with the carrier? Am I really stuck with an untinkerable phone?
Appreciate your help guys...
Click to expand...
Click to collapse
---------------------------------------------------------------------------------------------------------------------
I have same phone and now i have a galaxy note 3 too so i don't use acro anymore. so i wanted to root my acro phone. i know what you are going throw because acro phone is unable to root. So i flashed the firmware and then i could root my phone and everything is working fine. Originally my acro had "IS11S_4.0.1.B.0.118_au" firmware so i flashed it in to "IS11S_4.0.1.B.0.112_KDDI" then i could root acro. if you want to know all the steps let me know i'll post all the steps.
Good Luck.!

Hi DeadCode, can you please post the steps for the above sony xperia is11s to put on IS11S_4.0.1.B.0.112_KDDI.ftf ?
Also, do you know if this phone could be used in UK?
Thanks

Ok sure. Please wait im my phone xda app and i just woke up. I'll post the steps soon as possible.
Sent from my SCL22 using XDA Free mobile app

Install Flastools and Flashing a new firmware
BadSeeds said:
Hi DeadCode, can you please post the steps for the above sony xperia is11s to put on IS11S_4.0.1.B.0.112_KDDI.ftf ?
Also, do you know if this phone could be used in UK?
Thanks
Click to expand...
Click to collapse
Also, do you know if this phone could be used in UK?
Click to expand...
Click to collapse
- I don't know you can use it in UK or not. But i think if you can find CDMA mobile network provider yo may have a chance to use it. Also you may need you sim unlock.
Install Flastools and Flashing a new firmware
OK this is how i flash my firmware.
I have a Windows 8.1 running PC so this is the steps i did.
First you need to download two files so first download below files.
IS11S_4.0.1.B.0.112_KDDI.ftf
https://mega.co.nz/#!kVInSCQQ!bx7sX1izriRgHK14dmXC1r2LEKTZ4By6CBW5UjAcqww
flashtool-0.9.18.3-windows.exe
https://mega.co.nz/#!JVpBjTaI!fV-1JgQm7-bmMbL-xBxYOKhDAMZcS-aUsIreEm_gvFk
Then you need to install flashtool-0.9.18.3-windows.exe. Just double click and install it and Remember the installing folder (Example - "C:\Flashtool" or "C:\Program Files\Flashtool" like that) and then go to that folder. Inside that folder go to drivers folder and install Flashtool-drivers.exe. Click next check the Flashmode Drivers and Fastboot Drivers (Very important you select those) and go down the menu and select the phone model (Read all well). Then install. If your installation finis without warning errors then you ok. If your installation finis with warning errors then do next step.
Go to PC Settings (Charms Bar) > Change PC Settings > Update And Recovery > Recovery > Restart Now (Advanced Startup)
it will restart to Advance Startup automatically
In Advance Startup -
Troubleshoot > Advanced Settings > Start-up Settings > Restart
After rebooted you will get a screen says. Here to choose options for that we have to use function keys. Now press "F7" to select "Disable Driver Signature Enforcement" .
Now your PC will boot with Disabled Driver Signature Enforcement and you will be able to install Flashtool/Fastboot drivers. so again install the Flashtool-drivers.exe and will finish without errors.
after that again go to falshtool installed folder and go to Firmwares folder and if you see any files already on that firmwares folder delete them. Then copy IS11S_4.0.1.B.0.112_KDDI.ftf file that you download before to firmwares folder. and then run FlashTool.exe (If your PC 64bit then run FlashTool64.exe)
Now on your device go to (Very important to do all the steps below)
01. settings > Application settings > Development > check USB debugging
02. settings > Application settings > uncheck Unknown sources
03. settings > Sony Ericsson > Connectivity > USB connection mode > choose Mass storage mode
Then connect your device to PC using Original USB cable.
Go to flashtool software click on flash icon.
Then chose Flashmode > ok
Then new window will open (Firmware Selector) then you can see the IS11S_4.0.1.B.0.112_KDDI.ftf file already on that.
Now just click on FLASH.!
That's all wait it to finish. and your device will restart automatically. and DONE.!
I couldn't remember where i download those files but i already had those so i upload it for you and anyone who want to download those.
And if this post helps you then be kind enough to click on THANKS for me.!
Enjoy.!
By - DeadCode - Knowledge is free

Thanks for the instructions, I will give them a try.
Do you know if it is possible to unlock the bootloader on this model? Service menu days its not possible?
Thanks

BadSeeds said:
Thanks for the instructions, I will give them a try.
Do you know if it is possible to unlock the bootloader on this model? Service menu days its not possible?
Thanks
Click to expand...
Click to collapse
I didn't try to unlock it because im not using that phone anymore sorry
Sent from my SCL22 using XDA Free mobile app

[Q]

so i have rooted xperia arc. noticed that there were new update (4.0.2.A.0.42). so i resetted to default settings cause otherwise it wouldnt let me install that update, then after about 5 mins of updating arc shutdown and now it wont turn on.. so i ask what should i do?

was your arc bootloader unlocked when you did this?

When your BL is locked, just flash it via SEUS.

yes, bootloader was unlocked.
thank you for quick replys

There is a fix in the sticky's
For future only people who unlocked with setool can update via FOTA, SEUS and PC Companion.
Unless you relock your bootloader

Jinx13 said:
There is a fix in the sticky's
For future only people who unlocked with setool can update via FOTA, SEUS and PC Companion.
Unless you relock your bootloader
Click to expand...
Click to collapse
that was usefull! thanks, only problem now is that it wont connect to pc cause pc cant install "s1boot download".

You follow the link in the tutorial closely? Needed drivers are in the flashtool directory

found them but dont really know which one i need or where to put..
edit: now that flash started but it tells me to turn debugging and uknown sources on... but how cause i cant turn that even on
edit2: after reading almost full sticky thread tried that xperia play firmware which someone said it worked, now when i try to turn it on green led blinks.. is my phone piece of junk now?

so anyone know what should i do? it wont turn on, green led blinks when i press power button, phone vibrates when i press menu button (to start fastboot).

In Android Developement of Arc is a sticky with a fix for FOTA bricked phones, just do that
Sent from my LT15i using XDA Premium App

If you are still stuck I can repair it contact me via PM as i'm not allowed to discuss it on the forum

Xperia ion Bootloader Unlocking & Relocking

Taken from [Tutorial] Xperia S/P/U/Sola Bootloader Unlocking & Relocking and modified slightly for the ion. I take no credit for this tutorial.
Quick tutorial for unlocking & relocking the bootloader of the Xperia ion.
This is the official way to unlock bootloader
Warning!
This procedure will wipe the /data partition of your phone, so you will loose all ur stored data, settings. SDCARD will NOT BE WIPED!!!
DRM keys WILL be lost forever
Why should I unlock the bootloader?
You can flash custom ROMs/Kernels.
You don't need to worry if the new firmware can be rooted or not as with unlocked bootloader you can always ROOT your device.
SE/Sony gives sneak-peaks/preview builds of latest OS which requires unlocked bootloaders, as they did with Xperia 2011 line (they had ICS alpha/beta), so who knows may be SE/Sony may give early builds of ICS (JellyBean???)
Most of this is taken from lollylost100's his tutorial from ARC thread (all credits for that concise tutorial go to him, i have elaborated on a few things and added device specific changes)
[ Before we begin unlocking bootloader ]
Get the IMEI code for your device: type *#06# in phone dialer to find it out, note only the digits (no dashes)
Download the fastboot package with usb drivers (alternate drivers if the ones in package dont work)
Make sure u have a windows PC with USB cable to connect the phone
Power down your phone and keeping the Volume Up button pressed connect the USB cable to PC this will trigger FASTBOOT mode and windows will start driver installation, extract the above package and point the driver install to that location (usb_driver) folder
Once drivers are installed just disconnect cable and power on device
[ how to unlock ] (official way)
Go to: http://unlockbootloader.sonymobile.com/ and read everything!
At the bottom click 'Start Unlocking the Bootloader'
First, you should confirm that it is possible to unlock the boot loader of your phone by checking the service menu. In your phone, open the phone dial pad and enter *#*#7378423#*#* to access the service menu.
In your phone, tap Service info > Configuration > Rooting Status. If Bootloader unlock allowed says Yes, then you can continue with the next step. If it says No, or if the status is missing, your device cannot be unlocked.
Click to expand...
Click to collapse
After you have verified that you can unlock bootloader, scroll to the bottom of the page and click "Continue"
You will get "Are you sure prompt" accept it by clicking "yes i am sure" (i assume that you have read an understood it)
Then accept the "legal terms"
Finally you will get a "Create Unlock request" page, enter your IMEI (sometimes the last digit needs to be removed for this to work), name and email address
You should now receive your unique unlock key, its displayed on screen, SAVE THIS KEY SAFELY
Extract fastboot_with_Android_USB_file.rar and open fastboot folder
Hold SHIFT and right click on the background of the folder
Select 'Open command window here'
Connect your phone in fastboot mode (turn phone off, hold Volume UP button and plug in USB Cable) [make sure drivers are installed as explained above)
In the cmd windows type in fastboot.exe -i 0x0fce getvar version
If a value is returned (it will return 0.5), it means the phone is correctly connected
Type in fastboot.exe -i 0x0fce oem unlock 0xKEY and replace KEY with the key which you received earlier.
Your device should now be bootloader unlocked
If this tutorial is too much for you then itskapil wrote a step-by-step guide (and recorded a video also):
-Instructions: http://www.theandroidsoul.com/how-to...-play-neo-pro/
-Video: http://www.youtube.com/watch?v=LRH3pC7MhEA
(the above videos and some steps are for Xperia 2011 devices, but most the steps are same for Xperia ion)
Info on Relocking bootloader is in next post

Relocking bootloader
RELOCKING BOOTLOADER WILL ALLOW YOU TO GET NEWEST UPDATES & REPAIR DEVICE USING SEUS/PCC
Before we begin relocking the bootloader make sure that u have flashtool download & installed
You can get the latest version of FlashTool from:
http://androxyde.github.com/Flashtool/
Download link is under "Installation" tab
If you have not use FlashTool before read this thread:
http://forum.xda-developers.com/showthread.php?t=1526866
Download this FTF:
Xperia ion -> LT28-ION_Relock_bootloader_Dogsly-TEST.ftf // Mirror 1
Flash this FTF via FlashTool:
When it says enter flashmode, power down device and keeping VOLUME DOWN button pressed connect usb cable to phone, the device will now enter flashmode (green LED)
After this file is flashed reboot phone
Bootloader will now be relocked!!!
Incase device doesn't boot DO NOT PANIC... You can flash stock firmware FTF anytime to get back to stock ROM
P.S.: there is no official way to relock bootloader

So because my phone says I can't unlock the bootloader, does that mean I can never unlock the bootloader? Or do I have to wait to be able to root it first?
PS: I got my ion from Best Buy so is that why? Will I ever be able to unlock the BL ? I've rooted and unlocked my x10, back in the old days lol but I'm just wondering if there's any difference with getting a phone from at&t directly or from the sony store and best buy.

Auggy99 said:
So because my phone says I can't unlock the bootloader, does that mean I can never unlock the bootloader? Or do I have to wait to be able to root it first?
Click to expand...
Click to collapse
Have to wait to see if another way to unlock the bootloader is discovered. Root and unlocking the bootloader are two different things that accomplish or allow different things you can do on the phone.
IE rooting allows you to uninstall system apps & bloatware, backup apps/data, make changes to build.prop etc. Unlocking the bootloader will give you access to fastboot so you can flash custom roms/kernels and other images such as a pre-rooted system image to gain root.

I wonder. If we can not unlock the bootloader for some LT28at, why is there a key to unlock it? I did the Sony bootloader unlock for fun and apparently they have a key for my LT28at even though it says bootloader unlock is not allowed.

Bach415 said:
I wonder. If we can not unlock the bootloader for some LT28at, why is there a key to unlock it? I did the Sony bootloader unlock for fun and apparently they have a key for my LT28at even though it says bootloader unlock is not allowed.
Click to expand...
Click to collapse
You can unlock bootloader on the LT28i and, accordingly, there is a file to be relock bootloader LT28i

dogsly said:
You can unlock bootloader on the LT28i and, accordingly, there is a file to be relock bootloader LT28i
Click to expand...
Click to collapse
I understand that works for lt28i but I'm referring to lt28at the us model of the ion and why there is a bootlloader unlock code when we can't unlock it.

see if it works

Has anyone with an ion that has
Bootloader unlock allowed says Yes
Click to expand...
Click to collapse
tried to unlock it via the sony site and if you did and it was successful have you tried to relock it using the file linked above? Would be nice to know if that works.

Possible fix?
If the LT28i can be unlocked, what if we flash the international firmware on our LT28at's and then do the LT28i method? Maybe a stupid question but this is the first phone I've had that's a challenge to do stuff like unlocking and rooting. My last phone (HTC Aria) was extremely easy.

SU1CiDE said:
If the LT28i can be unlocked, what if we flash the international firmware on our LT28at's and then do the LT28i method? Maybe a stupid question but this is the first phone I've had that's a challenge to do stuff like unlocking and rooting. My last phone (HTC Aria) was extremely easy.
Click to expand...
Click to collapse
Flashing firmwares does not change the ability to unlock the bootloader.

Spectre51 said:
Flashing firmwares does not change the ability to unlock the bootloader.
Click to expand...
Click to collapse
Kinda figured that

I tried to relock the bootloader. The flash pass but the phone can't turn on after that.
*I reflash the stock kernel again and the phone can power on now.
So here is the result, once you relock bootloader, you need to flash back the stock kernel in other to turn on the phone. Hopefully this will help those people who got stuck after relock bootloader.

Hello guys
I was just wondering, if bootloader unlock or flashing cutom kernel will allow to use sim cards from other mobile operators (European for ex.) ?
I have an ability to buy this device in us through my friend. but Im interested if I would be able to use it in Europe I was thinking of buying xperia p or s, but they dont have microsd card support.
Im not interested in using LTE networks. Just common 2g.
I planning to use it like a second android device as a multimedia player instead of my galaxy s wifi5.0. (because of good sound quality and other features).
Thanx a lot for responses

Assyle said:
Hello guys
I was just wondering, if bootloader unlock or flashing cutom kernel will allow to use sim cards from other mobile operators (European for ex.) ?
I have an ability to buy this device in us through my friend. but Im interested if I would be able to use it in Europe I was thinking of buying xperia p or s, but they dont have microsd card support.
Im not interested in using LTE networks. Just common 2g.
I planning to use it like a second android device as a multimedia player instead of my galaxy s wifi5.0. (because of good sound quality and other features).
Thanx a lot for responses
Click to expand...
Click to collapse
No. You can't unlock the bootloader of the lt28at and you can't sim unlock it either. Best bet is get an international version not one from the US.
Sent from my LT28at using Tapatalk 2

Spectre51 said:
No. You can't unlock the bootloader of the lt28at and you can't sim unlock it either. Best bet is get an international version not one from the US.
Sent from my LT28at using Tapatalk 2
Click to expand...
Click to collapse
ok. thanx
probably wait for Xperia acro S... probably will be sold in europe in nearest future.

Drivers aren't working for my device. The alternative drivers link isn't working. Can someone please upload the alternative drivers. Thank you.:good:

i'm sorry if it was mentioned, but i didn't find . is there a way to unlock the carrier already for lt28at ? i don't mind losing the lte.

apkraven said:
i'm sorry if it was mentioned, but i didn't find . is there a way to unlock the carrier already for lt28at ? i don't mind losing the lte.
Click to expand...
Click to collapse
I think you can switch the rom to international version but it will still be bootloader locked. Not sure about carrier
Sent from my Sony Xperia Ion

apkraven said:
i'm sorry if it was mentioned, but i didn't find . is there a way to unlock the carrier already for lt28at ? i don't mind losing the lte.
Click to expand...
Click to collapse
Read this thread: http://forum.xda-developers.com/showthread.php?t=1761578
Sent from my LT22i using Tapatalk 2

Unlocking Bootloader Trouble

Hello,
I bought a Sony Xperia Acro S off eBay and the seller must have forgotten to mention that it's a Chinese version phone.
Navigating settings and switch the language to English was simple enough, but then I realize it's bloated with Chinese apps and lacks 'Play Store' and has something called 'PlayNow' in its place -- which is the real problem.
After searching a while I decided my best bet would be to unlock the bootloader so that I could install something different using Sony's flashing tool.
This, of course, requires me to first unlock the bootloader.
I attempted to follow the directions at the Sony 'unlock boot loader' sire in order to do this, but unfortunately at step 15 things don't go well for me and when I enter the command prompt fastboot.exe -i 0x0fce getvar version , instead of getting a version return I get a list of command (attachment) options and I have yet to find anywhere after 8 hours of forum searching to tell me what to do. All I see is, "You should get..." yeah, well... I should... but I don't.
My next move was to try and use flashtool in order to unlock the bootloader. So I downloaded it, installed it, then installed the accompanying driver program with all boxes checked.
I clicked the BLU button and set it to flashmode as it told me, then switched to fastboot mode as it told me, then it when it gets to the unlocking part o the process it shows my IMEI number and asked for the bootloader key that Sony sent me.
I'm feeling pretty good at this point and enter the key and then what do I see? FAILED (remote: oem unlock failed!)
I really don't know what my next move is. I'm just hoping someone her has my missing information.
If anyone has any ideas I'd appreciate it. Thanks.

Try Again, make sure you entered the right IMEI Key (i acidently typed the wrong one a couple of times)
also make sure Fastboot, ADB are installled, (ALSO make sure that the drivers for the Device are installed)
if you need anything just ask or google it, im sure someone else can help you more than i can aswell
If all fails your boot-loader may be non UNLOCKABLE

Envious_Data said:
Try Again, make sure you entered the right IMEI Key (i acidently typed the wrong one a couple of times)
also make sure Fastboot, ADB are installled, (ALSO make sure that the drivers for the Device are installed)
if you need anything just ask or google it, im sure someone else can help you more than i can aswell
If all fails your boot-loader may be non UNLOCKABLE
Click to expand...
Click to collapse
It is unlockable... that's one of the first steps. Don't forget that Sony even sent me the unlock key.
The IMEI is automatically detected by flashtool and it is uneditable. It's correct nonetheless.

Unlock Code sending by Sony
kcorrie4 said:
It is unlockable... that's one of the first steps. Don't forget that Sony even sent me the unlock key.
The IMEI is automatically detected by flashtool and it is uneditable. It's correct nonetheless.
Click to expand...
Click to collapse
Hi, I have an unlock code given from official Sony Developer website, but i can't go into flashboot mode ( unlock alowed: no ). There is any way to impact the unlock code given?
Thanks
[Xperia Acro HD, rooted, cwm, unlock allowed: no]

Xperia Arc S (LT18i) Can't enter fastboot mod, no blue LED and Insert Simcard problem

Hello.
I've searched forums and found some threads like this but my problem is a bit like them and a little bit different at the same time.
Sorry for my ENGRISH
I have Sony Ericsson Arc S, (LT18i). My brother bought it from UK and bringed to me, to Türkiye (Turkey). As you guessed, Turkish simcards didn't work and my brother gave money to a mobile phone seller to unlock it's simlock. After this, we able to use phone with Turkish simcards in Turkey.
The other day, after a couple years, I wanted to install a custom ROM on my Arc S.
This is how everything started.
I searched XDA forums and took notes. How can I do it, which programs needed etc.
Preparing
First, I did a factory reset.
After the phone opened, I changed usb connection to MSC, allowed Unknown sources and opened USB debugging.
I installed Flashtool 0.9.10.0. I readed a couple posts about that, previous versions gives no errors.
Under /drivers folder I found a driver package. Installed it with just Flashmode, Fastboot and Sony Ericsson Arc drivers selected.
Pluged in my phone and checked if it's drivers installed or not. Success. I can see my phone in device manager.
Installing
I readed a few guides and they say I have to Unlock bootloader. So I clicked Bootloader Unlock option in Flashtool. Followed the instructions, gone into flashmode, restart, gone into fastmode with pressing menu button and plugging the usb cable etc. There was a window with my IMEI and I followed the instructions and I get a code (long, including letters and numbers) from official sony website. I entered this code to that window and it said my bootloader is unlocked.
After that, I rooted the device. No errors.
Installed CWM via Flashtool. No errors as far as I remember.
AND THIS: Flashing a ROM. I found an Android 5.0.1 ROM and it said that I had to flash boot.img. So I did. I mean, I tried. I GOT ERROR. And, BUM. Something happened and I couldn't open the phone.
After a search, I found a solution says using Sony Companion may restore the phone. I tried this. Follow the instructions and my phone opened with ICS 4.0.4 instead of old version, 2.3. And now, it says, INSERT THE SIM CARD.
I searched the forums about 2 days and didn't find a solution to this. It ignores my sim card. Then, I saw a secret code about simlock and bootloader status and entered that code *#*#7378423#*#*
Under Simlock option,
They say there must be X's. At least the first one must have X on simlock screen but it hasn't. And there are all 0's. No X's, and zeros. So this is bad i think.
Under Configuration
In configuration section, it says Bootloader Unlock Allowed: No. As far as I learned from XDA forums, that means bootloader is locked again. Because it must be unlocked or unlock allowed: yes.
So i tried to unlock bootloader again. I had no idea what I've done. First, it said go flashmode. Done. And it said go into Fastboot. I couldn't. No Blue LED.
You see the thing? => Flashtools says go Fastboot to run Bootloader unlocker. I can't. Forums says I have to bootlocker unlock to enter fastboot. Bootloader unlock to enter fastboot. But enter fastboot to boot unlock. Wow.
Lastly, I tried flashing custom TFT's to see if it can flash or not. IT FLASHED. I can flash STOCK TFT's, even a KERNEL i downloaded from here. I can Root, install Busybox ( I don't know what is it haha), Install CWM 5.0.
But since it can't see my Sim Card, i didn't try to install custom ROM.
What I have to do? How can I unlock to simcard lock if it's locked? is my bootloader locked?
My brain hurts.
I wrote all things because it's easy to solve a problem with more information. So a few things more:
I use Windows 10.
I didn't use original cable at first. But you know, no errors now. It's not important at this point I think.
I unistalled mobile device from devices manager and delete the driver. I installed inf file from sony website and selected it for ADB driver. It says now Sony sa01102 ADB Interface Driver. If Fastboot needs correct drivers, I installed from it's official site, offical one.
I didn't tried another computer because again; no errors from Flashtool.
THANK YOU ALL.
I maybe copy this to other websites.

About Loader.sin Error
I did get Loader.sin Error a few times. But when I use previous Flashtool version, there was no loader.sin error.

"In configuration section, it says Bootloader Unlock Allowed: No. As far as I learned from XDA forums, that means bootloader is locked again. Because it must be unlocked or unlock allowed: yes." It means you cannot unlock bootloader! Its not possible , your phone is locked , i mean you cant run fastboot mode , its locked , install stock firmware and thats all , you cant install any custom firmwares as Cyanogenmod or custom kernel anymore. If you can't understand it sorry because english is not my main language.