The master reset code for a Samsung E250 is *2767*2878#. Entering this code on the phone keypad resets the phone to factory settings and removes any set password.
Many people forget the password for their phones, and a master code reset is a simple way to get around that block. Before using the master reset code, all information on the phone, including contacts, must be backed up to the SIM card. Next, the SIM card is removed, and verification is made that the phone is fully charged. Then the phone is powered on, and the reset code is entered correctly, using no spaces. The phone automatically reboots to the main menu. At this time, the new password can be set and the SIM card reinstalled.