SOMETIMES I FOUND THAT THE LAST 4 NUMBERS WILL UNLOCK BUT THAT IS IF A PASSWORD YOU HAVE ALREADY PUT IN..IF IT ISN'T THE LAST 4 OF PHONE NUMBER YOU WILL HAVE TO CALL YOUR SERVICE PROVIDER.THEY WILL TAKE YOU THROUGH STEPS TO RESET
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you can reset the security password by using nokia tool program but you have to be an expert to know how to use this program.
or you can format the memory card but you will lose all data in it.
if you want to format it ..you need to remove the memory from your phone the insert it in another phone or in a card reader then you make format for the memory.
then the password and all data will be erased.and it becomes a new memory.
1.- Basic Reset or Soft Reset for nokia 6270 This option restores the .ini files from the ROM.
Does not erase data (photos, videos, documents) or applications from
a third party. Key Code *# 7780 # (click this combination of keys on the
keyboard in the mobile)
2.- Total Reset or Hard Reset for nokia 6270
This option restores the original operating system from the ROM.
Formats the C: partition and deletes all data including the memory
card. Key Code *#7370# (click this combination of keys on the keyboard
in the mobile) Important:To proceed to reset, the battery must be full and the
mobile device connected to the charger. If during the course of reset,
the mobile stop receiving electricity it can ruin the internal flash
memory of the mobile device and stop function.