Develop Bugs

[Q] Bootloop on LT15i

My LT15i got upgraded to .62 version via OTA and I wanted to downgrade it to .42 to root it safely and easily. Something didn't work out and after flashing the downgrade my phone got bootlooped. I downloaded different official ROMs to go back to, but I can't flash them
LT18i_4.0.2.A.0.42_(1254-2716).ftf
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25/026/2012 19:26:29 - INFO - Flashing system.sin
25/026/2012 19:26:47 - ERROR - Error flashing. Aborted
LT15i_4.1.B.0.431_Generic.Global.World.ftf
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25/026/2012 19:26:29 - INFO - Flashing vendor.sin
25/026/2012 19:26:47 - ERROR - Error flashing. Aborted
Any ideas what can I do? I didn't use fastboot since I'm not sure what should I do with it, just flashtool.

Just keep flashing it or use Update Service to repair it.
There are dozens of generic ROMs.
e.g. http://forum.xda-developers.com/showthread.php?t=1491066

Use Flashtool repeatedly.. doesn't always work the first time around..
Does the LED indicator change after a while of being plugged in in flash mode? Check this, as I kept having the same issue. I just kept yanking the cable out and plugging it back in and repeating the procedure over and over until it fianlly flashed the kernel for me.
Was using arcknight kernel when i got stuck in bootloop, flashed to stock kernel and repaired over SEUS before unlocking BL and rooting once again using zergrush

Follow these steps.
pre requisites - Rooted/Bootloader unlocked.
1. Download the Flash tool.
2. Download the generic global rom - LT15i 4.0.2.A.0.42 (.ftf) [Search in the forum]
3. Flash the ftf using flash tool. (google how to flash using flash tool. There are numerous threads)
4. Once you successfully installed .42 firmware. [Using flashtool root the mobile using zergrush method. if u want]
5. Install busybox using flash tool.
6. Install x-parts from play store to install the CWM.
That's it.
Let me know if u have any problems.
Hit "Thanks" if anyone helped you.:good:
Xperia Arc LT15i
Rooted/Bootloader Unlocked
Running Jelly Bean - FXP138/CM10

KartzXDA said:
Follow these steps.
pre requisites - Rooted/Bootloader unlocked.
1. Download the Flash tool.
2. Download the generic global rom - LT15i 4.0.2.A.0.42 (.ftf) [Search in the forum]
3. Flash the ftf using flash tool. (google how to flash using flash tool. There are numerous threads)
4. Once you successfully installed .42 firmware. [Using flashtool root the mobile using zergrush method. if u want]
5. Install busybox using flash tool.
6. Install x-parts from play store to install the CWM.
Click to expand...
Click to collapse
The problem is, I used to have root and CWM installed, but now I can't enter it, because when I flash the ROM, it gets stuck in certain moment. I'm stuck somewhere between 3 and 4 point, where my flashtool doesn't correctly flash the ROM onto my Lt15i. From this bootloop I can't reach CWM or normal system to enter the google play or something.
I'll keep on trying flashing it, I'll also try to flash it from another computer
Is it possible that flashtool is being blocked by certain application like, I don't know, PC companion?
Additionally, I can't go back to the stock ROM via PC companion or SEUS, because when I'm in flashmode and phone is ready to flash, the PC companion says that my phone is already upgraded and there are no new updates to it, so it can't be upgraded, even tho there is some old flashed ROM inside ( I think PC companion reads the old ROM, that I used to have before bootloop, I believe it was the 4.0~~~~.62 version)

Masterossi said:
The problem is, I used to have root and CWM installed, but now I can't enter it, because when I flash the ROM, it gets stuck in certain moment. I'm stuck somewhere between 3 and 4 point, where my flashtool doesn't correctly flash the ROM onto my Lt15i. From this bootloop I can't reach CWM or normal system to enter the google play or something.
I'll keep on trying flashing it, I'll also try to flash it from another computer
Is it possible that flashtool is being blocked by certain application like, I don't know, PC companion?
Additionally, I can't go back to the stock ROM via PC companion or SEUS, because when I'm in flashmode and phone is ready to flash, the PC companion says that my phone is already upgraded and there are no new updates to it, so it can't be upgraded, even tho there is some old flashed ROM inside ( I think PC companion reads the old ROM, that I used to have before bootloop, I believe it was the 4.0~~~~.62 version)
Click to expand...
Click to collapse
Disable antivirus and run the flash tool with adminstrator. Try to refalsh the .42 firmware.
Try to flash the .42 ftf with old version of flash tool. I saw some cases where with new flash tool, .42 is not flashed successfully.
Hit "Thanks" if anyone helped you.:good:
Xperia Arc LT15i
Rooted/Bootloader Unlocked
Running Jelly Bean - FXP138/CM10

[Q] Arc s won't enter flashmode, please help!

Hello, I recently rooted my Sony Ericsson Xperia Arc S, everything was working fine.
So I decided to install a custom ROM ( Jelly Sandwich )
but after the installation, my device is stuck on the Sony logo, I can't even access flashmode to flash it back. Please help! Thank you.

I've got the exact same problem!

You are stuck in bootloop you either have to reflash the stock rom with flashtools or if you have open bootloader using fastboot install custom kernel.
I have never managed to get this room working on my phone without using custom kernel.
I no longer have this Rom but use pureness Rom on stock kernel without issues.
Sent from my LT18i using xda premium

Xraze0 said:
Hello, I recently rooted my Sony Ericsson Xperia Arc S, everything was working fine.
So I decided to install a custom ROM ( Jelly Sandwich )
but after the installation, my device is stuck on the Sony logo, I can't even access flashmode to flash it back. Please help! Thank you.
Click to expand...
Click to collapse
Open flashtool, put there original firmware http://forum.android.com.pl/f308/oprogramowanie-dla-sony-ericsson-xperiaa-arc-s-147007/
then pull out battery, put it back, then start flashtool and flash this original firmware. For me it has allways worked, every time got back to life, but root is gone, so new rooting have to too

Can I downgrade my Xperia S from official stock 4.1.2 to stock 4.0.4?

following the thread of DoomLord :http://forum.xda-developers.com/showthread.php?t=2302631
To have a rooted official sony rom 4.1.2, I need to have my XS initially in ICS and upgrade my rom with the doomlord pre-rooted version.
But my phone has actually upgraded to the normal 4.1.2 following the instruction from sony.
Trying to downgrade it again, I flash the .55 rom with the ftf file myself, but the phone cant reboot properly.
When I boot it, it freeze in the XPERIA screen for some seconds, then it stops and reboot to SONY screen and starts over the loop again and again.
I could only use sony update service to update it again now. Data is not wiped and seems everything is ok.
Anyone having the same problem currently?
Can some1 help me?
(maybe i should post in that thread myself but i still not enabled to post in development thread yet, sorry)

KWOKSFUNG said:
following the thread of DoomLord :http://forum.xda-developers.com/showthread.php?t=2302631
To have a rooted official sony rom 4.1.2, I need to have my XS initially in ICS and upgrade my rom with the doomlord pre-rooted version.
But my phone has actually upgraded to the normal 4.1.2 following the instruction from sony.
Trying to downgrade it again, I flash the .55 rom with the ftf file myself, but the phone cant reboot properly.
When I boot it, it freeze in the XPERIA screen for some seconds, then it stops and reboot to SONY screen and starts over the loop again and again.
I could only use sony update service to update it again now. Data is not wiped and seems everything is ok.
Anyone having the same problem currently?
Can some1 help me?
(maybe i should post in that thread myself but i still not enabled to post in development thread yet, sorry)
Click to expand...
Click to collapse
While flashing the stock ics ftf file [using Flashtool by androxyde], please be sure to check wipe data also. You must wipe data when switching between different android versions or else your phone won't boot. Also, wiping data will not wipe your sd card contents. Flashtool works even with locked bootloader so you can flash any ftf file.

Thankyou
yes, i did not wipe data

[Q] Upgrading xperia pro from 2.3.4 stock gb to xperia ulimate hd rom

Hi,
I am new to rooting and unlocking,i have been going through the forums for a couple of days but i have a couple of questions
1. After unlocking the bootloader on my stock 2.3.4gb,can i install any kernel and xperia ultimate hd rom on top of that,or do i have to update to ICS first.
if someone can just tell me how i can go from 2.3.4 stock on my pro to xperia ultimate hd it would be awesome,i dont need detailed steps but just a general idea
2. which kernel is preferred for xperia pro?
3.Is there a way to update without pc companion because i tether data from my phone so i cannot download the update and run the update on my phone simultaneously. i looked up on google and found the 4.0.4 update files,but mine is the international version and flashing the update from other regions onto my phone will cause any problems??

neo149 said:
Hi,
I am new to rooting and unlocking,i have been going through the forums for a couple of days but i have a couple of questions
1. After unlocking the bootloader on my stock 2.3.4gb,can i install any kernel and xperia ultimate hd rom on top of that,or do i have to update to ICS first.
if someone can just tell me how i can go from 2.3.4 stock on my pro to xperia ultimate hd it would be awesome,i dont need detailed steps but just a general idea
2. which kernel is preferred for xperia pro?
3.Is there a way to update without pc companion because i tether data from my phone so i cannot download the update and run the update on my phone simultaneously. i looked up on google and found the 4.0.4 update files,but mine is the international version and flashing the update from other regions onto my phone will cause any problems??
Click to expand...
Click to collapse
1. Yes, you can flash a stock ICS kernel with CWM recovery on it without updating to ICS(Jader recommends LuPuS kernel for Ultimate HD).
------------------------------------
Steps:
1. Place Xperia Ultimate HD.zip onto your SD card.
2. Flash LuPuS kernel(the stock based one)
3. Boot into CWM(Hold Vol down button when you see two blue flashes during startup)
4. Choose install zip/update, select zip file, then find and run Xperia Ultimate HD.zip
5. Follow instructions on AROMA installer. Do not check reboot at the end of the installation.
6. Boot back into CWM and reboot.
7. Your phone should be running Ultimate HD now.
------------------------------------
2. Kernel is determined by choice of ROM; it will differ with whatever ROM you choose to install.
3. Use flashtool and flash a ftf file. The update should not cause problems if it's generic region.
(Example: I bought my phone in Singapore but I can flash Generic Nordic ftf onto my phone with no problems)
僕のLT18iから送られてきた

[Q] Arc S not booting after flashing new ROM

Hello
As an initial note, I am not at all a techie guy. But I wanted to load Jelly Bean on to my Xperia Arc S. So I tried the following which I believe I should not have tried.
1. Rooted the device using ERoot 1.2
2.Unloaked the bootloader by following the steps described in sony website
3. Tried to flash Kernel using flashtool (latest from flashtool website) but was unsuccessful. It always says you need to root the device to flash in the activity log. But when I come out of fastboot mode, the flash tool always says the deice connected and it says the devise is rooted. But it never permits to flash the kernel in fastboot mode. I tried with different kernels, but unsuccessful.
4. So out of curiosity, I just decided to proceed with installation of jelly bean based on cynagenmod 10. So downloaded the Jelly bean ROM & doodle apps and copied to sd card.
5. I installed the CWM using x tool from play store.
6. opened the recovery mode and deleted all cache and other thing as per a video in you tube. Then proceeded with the installation of Jelly Bean and google apps. Installation was successful.
7. But when I restarted the phone, it just shows sony logo and hangs. It never starts.
8. After this I tried to flash a kernel again, it still says the devise is not rooted.
9. After reading few forum threads I decided to relock the bootloader and use pc companion to reload ICS or GB. I flashed a bootloader locker ftf file and was successful.
Now my phone is still showing only sony logo while boots and nothing. The PC companion is not detecting. Am stuck now. I don't know what to do. Please help. I donno if I did something wrong and l will have to discard my phone.

It's not the end of the world.
haristah said:
2.Unloaked the bootloader by following the steps described in sony website
Click to expand...
Click to collapse
Did you follow all the steps correctly? Because the next step says....
haristah said:
3. Tried to flash Kernel using flashtool (latest from flashtool website) but was unsuccessful. It always says you need to root the device to flash in the activity log. But when I come out of fastboot mode, the flash tool always says the deice connected and it says the devise is rooted. But it never permits to flash the kernel in fastboot mode. I tried with different kernels, but unsuccessful.
Click to expand...
Click to collapse
"Device must be rooted" error means bootloader is not unlocked. Check over, if you unlocked it properly, got all the codes correct etc.
haristah said:
5. I installed the CWM using x tool from play store.
Click to expand...
Click to collapse
There is no need for that. Custom kernels include Recovery already.
haristah said:
7. But when I restarted the phone, it just shows sony logo and hangs. It never starts.
Click to expand...
Click to collapse
The issue there, is that this ROM and kernel do not work together in combination. ICS kernel must go with ICS ROM, GB with GB etc. Kernel was not installed, thereby you were with JB ROM, but ICS kernel (Sony logo).
haristah said:
9. After reading few forum threads I decided to relock the bootloader and use pc companion to reload ICS or GB. I flashed a bootloader locker ftf file and was successful.
Now my phone is still showing only sony logo while boots and nothing. The PC companion is not detecting. Am stuck now. I don't know what to do. Please help. I donno if I did something wrong and l will have to discard my phone.
Click to expand...
Click to collapse
Locking bootloader didn't change anything. You have to restore your phone to full stock ICS with Flashtool. Download complete ICS firmware FTF file and flash it with Flashtool.

Someguyfromhell said:
It's not the end of the world.
Did you follow all the steps correctly? Because the next step says....
"Device must be rooted" error means bootloader is not unlocked. Check over, if you unlocked it properly, got all the codes correct etc.
There is no need for that. Custom kernels include Recovery already.
The issue there, is that this ROM and kernel do not work together in combination. ICS kernel must go with ICS ROM, GB with GB etc. Kernel was not installed, thereby you were with JB ROM, but ICS kernel (Sony logo).
Locking bootloader didn't change anything. You have to restore your phone to full stock ICS with Flashtool. Download complete ICS firmware FTF file and flash it with Flashtool.
Click to expand...
Click to collapse
Hey, Thanks for the reply.
I understand I need to restore ICS and ICS kernel completely. But for some reason I cant flash using the flash tool as it says the device is not rooted. But honestly I have rooted the device using ERoot and have unlocked the bootloader. I believe that is the reason why I was able to install the JB ROM.
Now I have 2 problem in front of me.
1. I cant flash as it says the device is not rooted
2. I have relocked the bootloader
what's next??

Flashtool does not need root or anything to flash ICS. You are doing something wrong then.
You have to flash whole FTF file in Flashmode. If you occur any error messages, post them here.

i had the same issue
haristah said:
Hello
As an initial note, I am not at all a techie guy. But I wanted to load Jelly Bean on to my Xperia Arc S. So I tried the following which I believe I should not have tried.
1. Rooted the device using ERoot 1.2
2.Unloaked the bootloader by following the steps described in sony website
3. Tried to flash Kernel using flashtool (latest from flashtool website) but was unsuccessful. It always says you need to root the device to flash in the activity log. But when I come out of fastboot mode, the flash tool always says the deice connected and it says the devise is rooted. But it never permits to flash the kernel in fastboot mode. I tried with different kernels, but unsuccessful.
4. So out of curiosity, I just decided to proceed with installation of jelly bean based on cynagenmod 10. So downloaded the Jelly bean ROM & doodle apps and copied to sd card.
5. I installed the CWM using x tool from play store.
6. opened the recovery mode and deleted all cache and other thing as per a video in you tube. Then proceeded with the installation of Jelly Bean and google apps. Installation was successful.
7. But when I restarted the phone, it just shows sony logo and hangs. It never starts.
8. After this I tried to flash a kernel again, it still says the devise is not rooted.
9. After reading few forum threads I decided to relock the bootloader and use pc companion to reload ICS or GB. I flashed a bootloader locker ftf file and was successful.
Now my phone is still showing only sony logo while boots and nothing. The PC companion is not detecting. Am stuck now. I don't know what to do. Please help. I donno if I did something wrong and l will have to discard my phone.
Click to expand...
Click to collapse
you have`nt flasshed the rom boot.img, probably, but anyway, download sony flash tool from official web site(emma), turn off you phone, open emma, press BACK BUTTON(NOT MENU BUTTON) , and it will instal the 2.3.4 android like new one and that is it i did it 3 times all ready

You might wanna use these tutorials for easy ROM installing.
hey,
I use this tutorial on official CM website to install any ROM in my Xperia Arc.
you might wanna try it. [use any ROM zip u want steps are same]
OR
There is one here in Xperia Ultimate HD thread.
Hope this helps