Hi all, I will start this page for all Omnia users to browse through quickly...All are welcome to contribute/suggest/feedback.

After you installed any Registry Editor, you will see the terms such as HKCR, HKCU, HKLM & HKU.

HKCR - When an application is installed, it sets up a unique GUID for the application and associates selected file extensions or mime types with the application.
HKCU - Where the application and operating system stores settings that are user specific.
HKLM - This is where the operating system stores hardware settings.

The registry editors that I know of are:
Kilmist Registry Editor
PHM RegEdit - Freeware (I am using this)
Resco Explorer
TascalSoft Registry Editor - Freeware
Total Commander - Freeware

The following is based on i900, it might or might not work for other models.
If you edit the regisry you do so at your own risk!

Activesync Omnia to PC
Application install to ask for location
Attach picture in your post
Auto-disconnect GPRS when idle - by jstuart91
Auto rotation - by imacken
Auto text completion in sms text, email address, etc
Backup contacts, etc
Backup Opera's bookmarks
Backup registry before editing - by ddaniels72
Backup your XT9
BlueTooth Name change
Clear up storage memory after surfing, etc
Change carrier's name
Change Font
Change location for camera pictures
Change mouse pointer (25 types)
Change Samsung Today 1 icons - by ddaniels72
Change startup & shutdown gif - by Geniusnoob
Change SMS notifications
Change Taskbar colour, Today text colour, etc
Change volume setting
Check firmware version
Check Omnia in lock or unlock state - by shokka9
Check total call out, sms sent, etc
Check useful information
Click "X" to close applications - by ddaniels72
Configure Opera, check type & build
Configure 2 soft keys
Configure 4 buttons, flashlight, wake up & end call button
Core Player & the Optical Button
Create new folder for SMS
Create own cursor - by ingoingo
Create short cut in "Programs" folder
Delete other Operator's names not in use
Delete IE default bookmarks
Delete one of the 2 "My Storage" folders
Delete Samsung Fun Club in Opera's bookmarks
Delete shozu autorun not in use
Delete Startup files - by asctony
Delete XT9 words
Disable box over dial pad during call - by Tiffer
Disable GPRS
Disable initial ringtone soft (i910 only) - by noteleks.org & skyline987
Disable keyboard auto deploy
Disable MSN low battery sign out when 20% of battery left

Disable Streaming Player shuts down when 20% battery left

Disable threaded sms without editing registry - by Tiffer
Download XTRA for faster GPS fix
Edit HKCR, HKCU & HKLM
Enable missed call/sms reminder
Faster loading of icons  
Favourite Registry Hacks - by sztupy
GPS fix faster without the use of XTRA
Hard Reset using the hard keys
Hard reset using the software Hard Reset - by chung
Hide SIM contacts
Increase File System cache
Increase File System filter cache
Increase font size for e-mail typing
Increase limit for cache, cookies & history
Increase Menu Bar font size
Increase Popup Menu font size
Increase sms area to 4 lines
Increase Touch Sensitivity
Increase Scrollbar Sizes
Incorrect software version solution - by chuvimongo
Improve Screen Calibration (Part 1)
Improve Screen calibration (Part 2)
Install another clock
Install applications for .cab, .msi & .exe
Install Manila 2D ROM - by shokka9
Install new theme
Install Microsoft .NET Compact Framework 3.5
Install NavFone PPC (GPS)
Install RegEdit - free Registry Editor
Install Skype in your Omnia
Install SPB Mobile Shell
ISO setting in camera
IMEI number checking
Listen to music with headphone & phone on silent mode
 
Meaning of "H", "3G", "E" & "G"
Meaning of Memories  

Mute start-up & shut-down tones
Mute Camera & Video shutter sound
Recorder in Omnia
Remove unwanted SIP
Replace MS carrier picture - welcomehead.96.png
Restore contacts, etc
Samsung Today 2 Screen setup
Save the contact number received in sms
Screen Capture your Omnia screen
Set clock in 12 & 24 hours format
Set Digital Clock
Set Opera as default browser
Set mp3/wave as ringtone/alarm tone
Set mp3/wave as SMS ringtone
Set ringtone for individual contact
Set 2 different wallpapers, 1 in portrait & 1 in landscape - by Obiwan
Show all hidden files in Omnia
Silent Samsung Widget
Simpler dial pad & save 6.3mb in ram
Skip MS BitMap
SMS Delivery Notifications permanently -by Tiffer
SMS sent deleted immediately
Stop Streaming Player shuts down when 20% of battery left
Store cache, cookies & history to Storage Card
Store SMS in My Storage - by BPC      #117
Switch on .NetCF3.5
Test front camera
Transfer files to My Storage/Storage Card
Transfer stuff to/from "Storage Card" or "My Storage"
View flash objects while surfing - by Obiwan
View video taken at full screen
Watch Movie in Omnia
Web Camera using Omnia

Forward SMS

Tweaks that can't work

Samsung Today 1 on i900 - Home page


Samsung Widget on i900 - Home page


Samsung Today 2 on i900 - Home page


Samsung Today 2 on i900 - Speed dial page


Samsung Today 2 on i900 - Settings page


   

02.Change volume setting (this is rom & FW dependent, it might not work for you)

dial *#0002*28346# on your Omnia,
increase db slowly (+3dB) in order not to damage your speaker.







click menu > normal > handset
original settings          my settings
DAC(0C) = -4.5 db       my -1.5          DAC - digital to analogue
SPK(02) = -3 db          my 0              SPK - speaker
MPBST(22) = +12 db    my same        MPBST -
RBST(14) = 0 db          my same        RBST -
RVOL(12) = 21 db        my same        RVOL - radio volume

Menu > Apply & back (to continue, once complete all, click ok)

clik menu > normal > headset
original settings         my settings
DAC(0C) = -1.5 db      my 1.5
HP(04) = -12 db         my -9              HP - handphone volume
MPBST(22) = +24 db   my same
RBST(14) = +20 db     my same

Menu > Apply & back (to continue, once complete all, click ok)

Menu > Normal > Camcoder
DAC(0C) -4.5
SPK(02) -3
MPBST(22) +12
RBST(14) +20
RVOL(12) 15

Menu > Apply & back (to continue, once complete all, click ok)

Menu > Talking > Handset
RCV(02) -3
RX(16) -3
MPBST(22) +12
MVOL(0E) 0
M2BST(10) +0
TX(08) -6

Menu > Apply & back (to continue, once complete all, click ok)

Menu > Talking > Earjack
HP(04) -7.5
RX(16) -6
MPBST(22) +12
MVOL(0E) 0
M2BST(10) 0
TX(08) -6

Menu > Apply & back (to continue, once complete all, click ok)

Menu > Talking > Speakerphone
SPK(02) -1.5
RX(16) 0
MPBST(22) +12
MVOL(0E) -3
M2BST(10) +0
TX(08) -6

Menu > Apply & back (to continue, once complete all, click ok)

Menu > Talking > BTMono
ADCV(12) +4.5
RX(16) -6
V2M(18) -9
TX(06) -9

Menu > Apply & back (to continue, once complete all, click ok)

Once all done, click ok, soft reset not required.

04.Delete shozu autorun not in use

It consumes about 400kb of memory. This saves your ram.

HKLM\init
                             
Scroll down & look for "Launcher140"     

Use your stylus, click on "Launcher140" until box appears, click delete

Exit to Today Screen, wait for 20 seconds, soft reset.

06.Configure opera, type “Opera:config” in the URL, click GO.





Check Opera type & build, type "opera:about" in the URL, click GO.

08.Install free registry editor attached below

Reason: to edit the registry in Omnia for:
a.better performance
b.increase in rom
c.increase in ram

Transfer to Omnia "Storage Card" & install

10.Check useful information

1. total SMS sent
2. total out-going call in minutes & seconds
3. battery left in %
4. CPU-in-use in %
5. ram balance in mb
6. memory balance in gb
7. data monitoring, etc

free utility >>> http://www.chi-tai.info/   >>> check for update, if any

Download: HomeScreen PlusPlus UI Cab Installer (formerly BatteryStatus Advanced) -
Version: 1.06.347 build 0347
Updated: September 30, 2008
Size: 163.8 KB

Press long on the Homescreen will bring up the Options Menu

12.Screen Capture your Omnia screen

App1 is my Menu key (top right hand side)



Do not click "Exit", click "X"

Go to any screen you want to capture & press App1

You can take screen shots for few minutes

ActiveSync to transfer pictures taken from Omnia to PC.

The pictures are stored in My Device/My Documents, they are bmp of 281kb.

14.Create new folder for SMS (this is rom & FW dependent, it might not work for you)

You have to disable threaded sms prior to creating new folder for SMS

Menu/Tools/Manage Folders.../tap on "Inbox" till "New folder" appears/click "New Folder"/type name & ok