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Please read this if you considering unlocking the boot loader or rooting your phone.
Please note that you may void the warranty of your phone and/or any warranty from your operator if you unlock the boot loader. You should only unlock the boot loader of your phone if you are an advanced user with good knowledge of the technology and risks involved.
For more information go here http://unlockbootloader.sonymobile.com/
Please also note
The Sony Xperia support team will not be able provide any support, related to unlocking the boot loader or rooting your phone.
We also recommend you to read the below blogposts.
Sony Xperia support team
2014-09-18 08:17 PM
2014-09-19 07:36 AM
2014-10-06 03:12 PM
I need some help in resolving issues with my Sony Ericsson Xperia Arc S (LT18i). sorry for big post.
I have loaded Cynogenmod on my mobile, but now I want to goto stok firmware. Please guide me the steps for noob.
Small back ground:
My bro bought this phone a year back and felt its slow and struck some times. So, I collected it from him and want to resolve issues . observed that there is a lag while opening dailer sometimes and sometimes after dailing number it takes approx 5-7 minutes to start dailing. so, wanted to resolve it .
What I did: I read your guide for rooting and rooted using Eroot_V1.3.4. (also unlocked bootloader using sony offical code from website http://developer.sonymobile.com/unlockbootloader/ as suggested @http://wiki.cyanogenmod.org/w/Install_CM_for_anzu#Obtaining_the_Bootloader_Unlock_Code )
Finally I got Cynogenmod on my mobile. but I observed many bugs in it. the Slow/lagging problem still exists.
Yesterday when I tried to switch on bluetooth, the mobile went crazy. it automatically rebooting for every 3-5 minutes.
I went to recovery mode, tried different options, no use.
Actually I have taken backup before installing cynogenmod (cm-9.1.0-anzu.zip).
I took backup in view of going back, if some thing goes wrong. I thought it is the offical stock ware backup(rooted,unlocked and CWM added stock).So, just want to go back and tried to restore it. After sometime CWM restore completed when i rebooted system is up without any message on screen , I can see mobile is on by light.no flash screen nothing. after 10 minutes, I had to got back to latest backup of Cynogenmod.
Now I can see mobile is starting and CWm loaded but started rebooting loop. Then as a last try I have wiped cache/data.
Now my mobile is working but sometimes getting rebooted.
So, in this situation I want to go back to stock rom. I just downloaded Xperia_Arc_S_Lt18i_4.1.B.0.587_1254-8596_Generic_India.rar (the link to 4.1.B.0.431 says This file is no longer available because of a claim by IFPI IFPI.)
Please advise me how to go back. I dont need unrooting or unlocking boot loader. Just going back to stock is fine.
the dailer lag, dailing lag are ok for now. Please help.
2014-10-07 09:40 AM
Nice that you downloaded the firmware already, it's the latest version.
Now you need to flash it and it's quite easy. Just see the first post of this thread, http://talk.sonymobile.com/t5/Android-development/GUIDE-How-to-Install-Jelly-Bean-ICS-Ice-Cream-Sand...
See the topic " Install Jelly Bean and Ice Cream Sandwich"
2014-10-08 08:19 PM
thanks Nebeel for quick responce. Noe I could revert firmware. Now I have to check how my system is working.
2014-11-03 08:16 PM
Thank You so much buddy, worked perfetly for my Xperia Arc S.
God Bless You.
2014-12-15 05:59 PM
Thanksssssssssss, me re sirvio! jajajajaj
2015-01-17 06:39 PM
2015-07-18 05:35 AM