Omnia SGH-i900 Hard Reset! _Here
When Omnia powered off,hold onto the Call and Cancel buttons, press and hold the power button for a approximately 5 seconds until the reset screen shows up. If you do it wrongly, you will hear the samsung jingle and the startup animation.When it is on,hold onto the Call and Cancel buttons,poke the soft reset hole and the reset screen shall show up.Screenshot.By the way, this hard reset does not erase the 16GB memory.To reset everything, you could use the software hard reset by going to Settings > Hard Reset. There is also option to format the storage card.One point to note though, if you decided notto format and press cancel, that will soft reset the phone.Tested 1 here with Phone Lock...