1100 security code unlock - Nokia 1100

For 5 consecutive incorrect passcodes, you will be prompted that you have entered incorrect password 5 times and need to wait for couple of minutes. You really have to wait, after waiting you can enter the default code 12345 then it should be working fine then. If in case that this won't work, you can try to hard reset phone by entering *#7370# and you will need to select yes for restoring to factory defaults. Remember that it will delete the settings and data saved in the phone not on the memory card but it will still be advisable for you to have a back up of everything before doing so.
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