Note: We are
Not responsible for any damage, try at ur own risk
Hacking the File System
of the K750
File System Hacking:
With access to the file system, you can change many system settings,
delete predefined content, change menu icons and layout, silence
the camera, remove operator logo, and many other cool things.
The techniques below assume
you have some understanding of how to access the internal file system
of your phone.
1. Remove SMS storage limitation
You can remove the storage
limitation so that you can store more than 500 sms?s. This trick
works by changing the sms message store to the tpa folder, where
the message limitation is not in force
Copy the file /ifs/settings/messaging/pref_store.txt
from the phone to the computer, make a backup, then edit it to read
/tpa instead of /smsdata, then delete the file from the phone then
copy in the new version.
Now you need to create the
message store in the /tpa folder. Create the following folder structure
in the /tpa folder:
/tpa/messaging
/tpa/messaging/sms
/tpa/messaging/sms/msg
/tpa/messaging/sms/FFFFFFFFFFFFFFFFFFFF
/tpa/messaging/sms/FFFFFFFFFFFFFFFFFFFF/pending
/tpa/messaging/sms/FFFFFFFFFFFFFFFFFFFF/sm
/tpa/messaging/sms/FFFFFFFFFFFFFFFFFFFF/sr
/tpa/system/messaging/sms
Restart the phone. You can
now stored as many messages as you like ;-)
HOWEVER, in practice you
can only store about 1000 messages, beyond and the inbox access
becomes painfully slow. In theory you can store 40000 or more.
2. Camera Sounds - Change
The camera sounds depend
on the files camerashutter.3gp and camerafocus.3gp. You can change
the camera sounds by replacing these files with your own versions.
The new sound files must have the same names as the old ones, and
be in 3gp format, preferably audio only.
Delete the existing files
from /tpa/preset/system/sound and then copy in the new versions.
3. Camera Sounds - Silence
Method 1: Disable Camera
Sound completely
The camera sounds come from
the files camerashutter.3gp and camerafocus.3gp. If these files
don?t exist, the camera is silenced. This means the camera makes
no sound even if the phone is not in Silent Mode. You could also
delete only camerafocus.3gp for example, if you only want the shutter
sound to be heard.
The camera sound files can
be deleted from /tpa/preset/system/sound
Method 2: Enable Silent
Mode for camera sounds
This method will enable
you to disable the camera sounds by turning on Silent Mode. When
not in silent mode, camera sounds will operate as normal.
Copy the customize.xml file
in /tpa/preset/custom to the computer and make a backup. Open customize.xml
in an editor and change the following setting from false to true:
<camera>
<suppress-camera-sound>true</suppress-camera-sound>
</camera>
Save the file then delete
the existing customize.xml on the phone and copy in the new version.
Important: You will have
to do either a settings or master reset before this trick will take
effect. Once you do, you will be able to silence the camera on demand,
simply by putting the phone into silent mode.
4. Backup Games and Java
Apps
All Java midlets can be
backed up by copying the jar and jad files from the phone to your
computer.
The jar and jad files at
can be found here: /tpa/preset/system/ams
To backup your games, simply
copy the jar and jad files in this folder to your computer.
The games will need to be reinstalled if you delete them from the
phone and then later want to reinstall. You can?t just copy the
old files back into the ams folder. But you can use the old jar
and jad files you copied from the phone to reinstall the game (the
same way you would install a game normally)
5. Deleting Pre-Installed
Content and Games
You cannot delete the pre-installed
content from the handset itself, but with access to the internal
file system you can delete ANY pre-installed content you want. Simply
browse to the folder where the preset content is stored and delete
it.
Here are the folder locations
for the various pre-installed content:
Games: /tpa/preset/system/ams.
Games: /tpa/preset/default/java
Sounds: /tpa/user/audio
Sounds: /tpa/preset/default/audio
Images: /tpa/user/image
Images: /tpa/preset/default/image
Themes: /tpa/user/theme
Themes: /tpa/preset/default/theme
Video: /tpa/user/video
Frames: /tpa/preset/system/multimedia/pe/frames
Frames: /tpa/preset/system/multimedia/pe/funlayer
Clipart: /tpa/preset/system/multimedia/pe/clipart
Notes on Pre-installed content:
Sometimes pre-installed content has a shortcut in the user folder
pointing to the actual image which is stored in the /tpa/preset/default
folder. For example, the shortcut file ?El Trumpet.mp3.@? in /tpa/user/audio
points to the actual image ?El Trumpet.mp3? which is in /tpa/preset/default/audio.
Delete both the shortcut and the actual image.
6. Change System sounds
The various system sounds
are stored at /tpa/preset/system/sound. If you replace them with
your own versions you can change the sound the phone makes for a
given system sound. For example you can replace the noisy lowbattery.mid
with something more subtle.
Replacement sounds should
have the same name and audio format (mid, mp3, amr) as the original,
and be about the same length.
To replace a system sound,
delete the existing sound from /tpa/preset/system/sound and copy
in your own version.
7. Change Startup and Shutdown
sounds and Images
Startup and shutdown images
and sounds are located in various locations. To change, simple delete
the existing file, and copy in your file with the same name. Here
are the various names, file sizes, formats and locations:
Boot image: SPLASH in /tpa/preset/system/settings/
This is the 176x220 pixel image displayed at boot up, called the
Splash Screen. Can be in gif, bmp or png format. Animation not supported.
Startup Image: STARTUP_IMAGE_SEMC
in /tpa/preset/system/settings/
This is the 176x220 pixel image shown after the Splash screen. This
image can be chosen by the user in settings/display/start-up screen
so you don?t need internal file system access to change this image.
Shutdown Image: SHUTDOWN_IMAGE_SEMC
in /tpa/preset/system/settings/
This is the 176x220 pixel image that is shown when the phone is
shutting down. Can be in gif, bmp or png format. Animation is supported,
but total number of frames should be kept low, and gif should not
be set to repeat animation, as this will slow down the shutdown.
Startup Sound: STARTUP_SOUND_SEMC.mid
or STARTUP_SOUND_SEMC.mp3 in /tpa/preset/system/settings/
This is the sound that plays when the phone starts up.
Shutdown Sound: SHUTDOWN_SOUND_SEMC.mid
or SHUTDOWN_SOUND_SEMC.mp3 in /tpa/preset/system/settings/
This is the sound that plays when the phone is shutting down.
8. Delete SE Web links
in user folders
Sony Ericsson or your operator
install links at the top of every folder in your phone?s file system
to websites with their content. These are pretty useless to most
of us, and serve only to clutter up access to our files. The links
are stored in two locations within the file system.
Firstly, as xml files in folders within /tpa/preset/system/custmenu.
For example the folder GAMES_HOOK_1 might contain an xml file pointing
to the operator?s game download page, as well as an image used as
the icon.
Secondly, the links are cached in the files cust_menu_data.dat and
cust_menu_done_unpacking.dat that sit in /tpa/preset/system/custmenu.
To get rid of an operator
link, you need to delete the folder in custmenu for the relevant
link, then delete the files cust_menu_data.dat and cust_menu_done_unpacking.dat.
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