Samsung i8910 Omnia HD Symbian hard reset
With the phone turned off, press and hold CALL + MENU + END key for a few sec.
Use this method to hard reset your Samsung i8910 Omnia HD Symbian phone: Enter *2767*3855#. Warning! All your data including contacts, messages etc. will be lost! Copy all your necessary data/Contacts/Messages etc. to SIM or make backup to your PC before full reset! Take out SIM card before full reset.