Samsung B110 hard reset
Restore the phone to the factory default settings.
Go to menu > 9. Phone Settings > 9.9 Reset settings
Use the 4-way navigation keys to scroll up, down, left, or right through the menu system.
Use this method to hard reset your Samsung B110 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.
If you know the hard reset using buttons / keys, pls leave a comment. All comments are welcome! :)