Samsung A200 hard resetUse following code for factory reset Samsung A200: Dial this code: 3845#*200#
Use this method to hard reset your Samsung A200 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.