[GUIDE step by step] How To Re-lock Boot loader on Xperia Arc

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First of all thanks Blagus for creating magical little file.

If you want your warranty back, follow this tutorial!

Requirements:

1. PC Companion and Update Service installed on your PC
2. FlashTool_0.2.9.1.exe – http://www.multiupload.com/7H4JT35B6G
3. Xperia Relock bootloader.ftf – http://www.mediafire.com/?g1b5j712ajx4yjd

Step by Step Guide:

1. Download the files given above in requirements.

2. Double click on ‘FlashTool_0.2.9.1.exe’ file to extract it, Or you can use free software like ‘7 zip’ to extract it.

3. Few files and folders will be extracted — the one which we’ll be using for flashing “Xperia Relock bootloader.ftf” files is the “firmwares” folder.

4. So copy the “Xperia Relock bootloader.ftf” file that you downloaded above, and paste it inside the “firmwares” folder.

5. Now double click on the “X10FlashTool.exe” file to run the program.

6. Once the program opens — click on the “Flash” button.

7. You’ll see a screen like the image given below — click “Ok”!



8. Now it should ask you to connect your phone to the PC. So first plug the USB cable to PC, then pick up your phone and hold the “Back” key (key at the bottom left on your Arc), and then connect the USB cable to your phone. Remember you’ve to hold the “Back” key while connecting the USB cable to phone.

9. Once the phone gets connected — Flashtool will automatically start the flashing process.

10. Keep an eye on the Flashtool’s screen.

11. And once the process gets finished, disconnect your phone from PC and switch it ON.


Enjoy!


ALL CREDITS GOES TO BLAGUS
original thread
http://forum.xda-developers.com/show....php?t=1134335

Sony Arc s?

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I know this question has been asked a lot, but will this work for sony arc s? and if it works, will sony arc s get the 1% battery problem ? Thank you

I also am interested in this method to close the bootloader is compatible with Xperia ARC S I very interested, there is some kind of problem, if supported, it works again FW update via OTA, SEUS, Pc compation

thanks

Originally Posted by DESMOYO

I also am interested in this method to close the bootloader is compatible with Xperia ARC S I very interested, there is some kind of problem, if supported, it works again FW update via OTA, SEUS, Pc compation

thanks

No joy Flashing tft files from op on my arc s. I chose arc as no option for arc s. Then use this tool http://forum.xda-developers.com/show....php?t=1259617 successfully. However i cant turned on my phone( i think because i was on unlock bl kernel) then i use seus to repair. Finally i get relock my bl. Sorry my poor english.

Originally Posted by teddymild

No joy Flashing tft files from op on my arc s. I chose arc as no option for arc s. Then use this tool http://forum.xda-developers.com/show....php?t=1259617 successfully. However i cant turned on my phone( i think because i was on unlock bl kernel) then i use seus to repair. Finally i get relock my bl. Sorry my poor english.

So this tool does not work for Xperia ARC S?

thanks

Originally Posted by DESMOYO

So this tool does not work for Xperia ARC S?

thanks

Yes It does. But you should flash stock kernel first unless you intent to use seus directly to get stock rom like i did. I hope you understand what i mean. Once again sorry for my poor english.

Originally Posted by teddymild

Yes It does. But you should flash stock kernel first unless you intent to use seus directly to get stock rom like i did. I hope you understand what i mean. Once again sorry for my poor english.

As I can install stock kernel again, I have only the kernel ...

Thanks for your help friend

Arc S (L18i) Users,

Unlocked Bootloader, and DooMKernel caused Problems for me. My Phone never got identified by PC companion thereafter. I wanted it so bad, So I decided to Reloack the Bootloader again.

Let me Save you lots of time,

Before Locking the Bootloader again,
If you're on DooMKernel, Reflash a Stock Kernel.
You can get the Stock Kernel, by Downloading the Stock FTF package and then Extracting it with 7zip. Find the Kernel.sin file and flash it using the Fastboot commands.

Once its done, If your device Still doesn't connect in USB mode, use SEUS and Update the firmware. No need to upgrade, Just re-install what you have.
SEUS needs the bootloader to be locked.

hi, so are you saying Re-locking your bootloader wont wipe out your phone ?
And Sony Already Took All Your Info When You Unlocked Your Phone So I Am Sure They Will Know That You Just Re-locked It Some How And Refuse To Fix It Either Way If Something Goes Wrong.

When i tried to relock my bootloader flashtool didn't see loader.sin i don't know what's wrong with it please help me...