[Android General] Narenme001:
HI Everyone

As you might have heard that you can't modify Sony Ericsson Arc s Flash file, i.e sin file, as it requires sony's signatures and blah blah...

but wellp it's not true, now you can modify it, i found a solution but it's a messy way to go through but well it works and tested by me. might also work Sony ericsson arc rom as well.

Note: The Yaffey tool is currently only supported on Windows pc. But you can other tools if you afe linux user their are several available

Here's the trick:

/**

# your warranty is now void.

I am not responsible for any damages to your phone or your surroundings.

**/

Tools needed(compulsory):

Flashtools (version 0.9.18.6)

WinRar (Recommended)

Yaffey tool (only Windows version available), or any yaffey editor extractor/repacker on your linux.

Notepad++ (text editor)

Steps:

Extract FTF flash file(your device flashfile).

Copy "sytem.sin" to a temporary working folder.

Open flashtools click "Tools" > "Sin editor" select the "sysytem.sin" file and click "Extract Data" then "system.yaffs2" file will be created in same folder.

(Download Yaffey tool from below)

Open yaffey tool.

Click "Open" and select the "system.yaffs2" file.

Now delete/modify from this tool, when done click "File" > "Save as" enter new name "system-new.yaffs2" and save it.

now you have a new "system-new.yaffs2" file.

Open flashtools goto "Tools" > "Sin editor" select the "system.sin" file again.

now click "Advanced" > "Create sin as" and select the "system-new.yaffs2" file which we created earlier, then click "Open".

wait till it's complete, now that "system-new.yaffs2" file will be converted into "system-new.yaffs2.sin" file, rename it to "system.sin".

Now extract the full Flashfile "*.ftf"(your device fashfile) in a temporary folder with Winrar. Now open the "META-INF/MANIFEST.MF" with any text viewer/editor and note down the "branding" and "version" it will be used while repacking the rom.

and then Don't touch any file just replace the "system.sin" file with the file we create renamed to "system.sin" earlier.

then most of you might know what to do, now we have to repack the flashfile by flashtools so Open Flashtools click "Tools" > "Bundles" > "create" then double click on Device column and select the device name by double clicking it. enter the Branding and version(enter the info we got earlier from "manifest.mf" file) check "No final verification". click "..." on upper right side and select the temporary folder where your full flashfile was extracted and click "ok". then you will find many files in "folder list" column select all files expect "*.ta" files if any. then click "->" button all files will be moved to "Firmware content" column then click "create", now wait till it's completed.

Now the rom is successfully created, You can find the firmware in "Firmwares" folder in flashtools data folder(for windows pc: it wil be in users or programdata folder in ".flashtools/firmwares/ dir").

You can now flash it to your device from flashtools

/**

Extra Info for those who can't flash a flashfile and gets error.

**/

If their's error then we need to change flashfiles cmd25 checksum to false.

then:

open flashfile.ftf with winrar, extract "MANIFEST.MF" file in META-INF folder to a temporary folder, and open it with Notepad++ and change line "cmd25: true" to "cmd25: false" remove the lines "rda: " and "revision:" if exists and save it.

the file should look something like this:

Manifest-Version: 1.0
device: LT18i
branding: (1254-2184)
Created-By: FlashTool
cmd25: false
version: 4.1.B.0.587

Now open Winrar open META-INF folder, then click "Add" and selct the edited "MANIFEST.MF" file and click "ok" again "Ok" in winrar dailog now the file will be overriden now it's you can flash it.

Enjoy

Really spent few hour to look around the internet but found nothing, i wanted to remove the bloatwares from my Sony Ericcson LT18i.

Get flashtools from GDrive:

Flashtools v0.9.18.6.exe (118mb)