If you encounter some problems & after several attempts still no improvement, try Hard Reset to return to latest flash FW setting. Back up your stuff first before the Hard Reset if you choose to format your Storage.

Option 1

Software Hard Reset:

On your Omnia, go to Settings/System/Hard Reset

Hard Reset options will appear on the screen for

a.Main Memory - Reset
b.My Storage - Reset
c.Storage Card - Format

A pop up will ask for confirmation & user is to enter "XXXX" to proceed.
i900 to use 1234
i910 to use last 4 digits of your mobile number
The phone resets, lingers on the samsung logo for a bit then the familiar Windows mobile device start up screen, which takes you through the start up process if you tap the screen to set up...
You may have seen this when booting up your phone initially
Alignment
Set date/time
Password

Option 2

Hard Reset using the hard keys:

1.Press soft reset hole beside the power button.
2.Press Call and Cancel Button together when you see the Samsung Omnia on the screen.
3.Reset Screen appear with "Are you sure you want to format? Format or Cancel".
  This hard reset does not erase the 8/16GB memory. To reset everything, use
  the software hard reset > Settings/System/Hard Reset.
  There is also option to format the storage card.

A trick to use for Option 2 - by asctony

1. place omnia on a flat surface
2. use 2 fingers to press and hold on the CALL and END CALL buttons
3. use stylus to soft reset phone

Option 3

Hard Reset by dialing code:

Use your Omnia dialing pad & key in

*2767*3855# - doing this will hard reset without warning, it will also erase your 8GB/16GB internal memory
   

In either way, should I have my phone re-programmed by *228 send?

Hi
just wondering if anybody can show me how to delete M2DC of my Omnia. I have tried the hard reset option but when it starts up i still get the black screen that i had on before.

Do you have a backup that you created prior to your changes? i always backup before I make any major changes and thus if I have a problem, I can restore. I don't like to use Hard Reset. Did you try the last hard Reset by ASCTONY?
Did you try this one?
1. shut down normally,
2. then when starting up, just hold SEND and END when turning the phone on. just keep holding them down, and instead of booting up you'll get to the factory reset screen. i've never used a stylus to hard reset at all

Good luck!

Hard Reset using the hard keys

Reset Screen appear with "Are you sure you want to format? Format or Cancel".
This hard reset does not erase the 8/16GB memory.

To reset everything, use the software hard reset > Settings/System/Hard Reset.
There is also option to format the storage card.

Hard reset will bring you back to the last FW.

the default code is the last 4 digits of your mobile #


you have to hold the send and end buttons while the phone is off and continue holding them throughout. then hold the power button to turn the phone on.

my bad, i wasn't too clear in my instructions, but i just tried it on my phone and it works.

step 1: turn off the phone by holding down the power button.
step 2: HOLD the send and end keys simultaneously (keep holding them from this point forward)
step 3: HOLD (and don't let go) of the power button (keep holding it as well from this point forward)
step 4: continue holding all 3 buttons, and you should see the samsung omnia screen, and then immediately after you should see a screen that asks you if you want to format? press send to format, press end to cancel

this just worked for me on my verizon omnia 910 about 30 seconds ago. there is no need to press the pin hole reset key or anything like that

   that's weird,  i tried it again on mine and it works. hmm i don't know what else it could be.. i'd record a video or something but it would have to be whenever i get home.