Samsung T139 hard resetFrom the main screen, select Menu then select Settings > Phone settings > Security > Reset.
Select All > Reset > Yes.
Enter 00000000 The default code Samsung T139 is 8 zeros) and select OK.
Use this method to hard reset your Samsung T139 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 with buttons / keys, pls leave a comment. All comments are welcome! :)