How to Reset to stock FW - Xperia Arc Q&A, Help & Troubleshooting

i had a 2.3.4 rooted and unlocked bootloader.
now i want to return to stock state: locked bootloader with non-root 2.3.4 firmware, what i have to do ?

"SEUS", and see the relock thread.
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Replacement phone

Just got my replacement phone after having the 0% issue the phone I have has 2.3.3 am I able to get a rooted 2.3.4 safely just flash UK then world gingerbreak and then ota?
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zombiej79 said:
Just got my replacement phone after having the 0% issue the phone I have has 2.3.3 am I able to get a rooted 2.3.4 safely just flash UK then world gingerbreak and then ota?
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Was you bootloader unlocked? i was wondering if my boot loader is unlocked will they replace my pohne
no mine was locked.just look up the relock bootloader post. you can relock it and do your replacement

Come back to stock rom with locked bootloader

Can I lock my bootloader again and install stock rom on arc s to get warranty back.please help.
Sent from my LT18i using xda premium
Hi,
you won't get back your warranty just by flashing the original SE software and relocking your bootloader.
If you want to go ahead: As I am not allowed to "spam the forum" by link to an site... ask google this: arc relock bootloader
and take the first link.

[Q] Should I update Arc after installing ZipIT VI

Hello!
I unlocked bootloader of my Xperia Arc and I installed ClockworkMod Recovery and ZipIT VI on it.
After this procedure I have following: Kernel version 2.6.32.9-perf [email protected]#11, Build number: FW: 4.0.A.2.368.
When connected to PC Companion, phone asks for update permission to a newer version (the previous I had before unlocking bootloader).
Should I allow this?
If yes, will I lose unlocked bootloader and ClockworkMod Recovery?
No you should not allow this if you want phone alive.
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So how would you update afyer unlocking bootloader? I.e. When getting a new firmware update newer then .42
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By using FlashTool
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Returning to stock...bootloader unlocked

I have an Xperia Play on Stock GB using DoomKernel.
The bootloader is unlocked.
It has begun freezing and apps not opening properly.
So I want to reinstall the stock ROM.
What is the best, easiest and safest way to do this considering I have the bootloader unlocked?
Thanks.
It's flashing the ftf via flashtool
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How to downgrade back to 4.1.2

Hey guys I've got Xperia M(4.3 JB) I need to downgrade my phone back to 4.1.2 so that I can root my phone without unlocking bootloader OR If I can root my phone with JB 4.3 without unlocking bootloader.
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Faisal.hasan said:
Hey guys I've got Xperia M(4.3 JB) I need to downgrade my phone back to 4.1.2 so that I can root my phone without unlocking bootloader OR If I can root my phone with JB 4.3 without unlocking bootloader.
Sent from my C1904 using XDA Free mobile app
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No need to go back to 4.1.2. You can fully root 4.3 with this. It's 100% working for me.
Make sure you use CVE-2014-3153.
But I need to backup my TA and I think it can only be done in rooted phone locked bootloader. So, is there any Way?
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You can root jb 4.3 using towelroot. You can find more info about it somewhere here in the Xperia m forum.
Here's the guide to rooting without unlocking the bootloader in 4.3:
http://forum.xda-developers.com/xperia-m/general/towel-root-steps-to-root-t2789990

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