Cannot update my Arc S ... :(

[#1]

Hi everybody,

Let me tell you before starting that i'm a real android noob. I know nothing about it. How to root, flash, change kernel etc. So i will appreciate if you answer me with most details

Well here is my problem. 2 weeks ago i wanted to root my arc s. I unlocked bootloader using fastboot or something like this, then i changed my mind and didnt root. Now there is a new update to arc s, but i cannot update my phone i googled everything i could imagine. And i know i need to re-lock my phone. So i found some sites telling me to download flash tool and a little file which i copy into the firmwares section of flash tool. It goes fine till there. But then it tells me to flash with using that little file( unlock bootloader?? I dont know) and there should be a .sin file which is name is loader.sin. Well its not there. There is only preset.something. I cannot proceed because i dont have that loader.sin file. Please help me with this i want my phone back

[Uliwooly · Accepted solution]

You came to the right place

This is how to relock your bootloader

http://forum.xda-developers.com/showthread.php?t=1134334&highlight=Relock

after that you can use SEUS or PCC

Don't forget to mark the Correct Answers & Helpful Answers

[Uliwooly]

this is a great Thread on how to change Kernel

http://talk.sonyericsson.com/message/142493#142493

Don't forget to mark the Correct Answers & Helpful Answers

[Uliwooly]

if you want to use Flashtool

Xperia Arc LT15i/a & LT18i/a 2.3.4  4.0.2.A.0.62   (latest firmware)

http://talk.sonyericsson.com/thread/29197

or

2.3.4           4.0.2.A.0.42  (LT15i/a & LT18i/a)

2.3.4            4.0.2.A.58    (LT15i/a & LT18i/a)

http://talk.sonyericsson.com/message/130711#130711

Don't forget to mark the Correct Answers & Helpful Answers

[#5]

Thank you uliwooly i searched this about 4-5 days without any results. you saved my phone

[Uliwooly]

Anytime, just remember that you can't restore the DRM files so apps like trackID won't work

Don't forget to mark the Correct Answers & Helpful Answers

[#7]

I have same problem ... can't update via pcc or seus.

I think my bootloader is unlocked because track id don't work. It was in service and I don't know wath they did to my phone. I tried to relock but pcc and seus steel not working.

Tried to flash with flashtool, not working...here is the error:

Tried to flash with wotan, worked, but they updatet the program, now don't work. I finished by bricking my phone, but repaired with "FlashTool_0.2.9.1_FOTAUnbrick".

Can I do something to get seus or pcc work for me? If no, even flashtool.

10x for help me.

[Uliwooly]

did you tried the link above to relock your bootloader?

are you saying that you sent your phone to Sony Service Center and they (SONY) unlocked your bootloader?

[#9]

No, it was in a center were I buy the phone. It was with 0% baterry issue. Now the phone is repaired, but I can't use pcc or seus to update. I think my bootloader is unloked because track id dosn't work in my phone. I tried to relock with flashtool, it sais that the operation is successfully done, but when I try to use pcc or update center I have the same response "update failed".

[Uliwooly]

that error could be your internet connection or your firewall or antivirus acting up on your PC

restart your PC -> press F8 -> safe mode -> run SEUS and try again