Resetting your NOKIA phone with a security code:

It's simple and dependent on the model of you nokia phone. Check out this methods;

Method One

1. Press the unlock key and you wil see "SECURITY CODE"
2. Press the red button then dial 112 and the phone will write "ATTEMPTING EMERGENCY CALL"
3. Wait for 5seconds and end the cal rush to the menu immediately the menu will open bt the phone will lock again bt just keep "DAILING AND ENDING" until you go to to settings then navigate with your direction then open phone setting just go to auto key guard and select "ON" and put it to any time of ur choice,has for me i use 02:30. Then the phone will automatically unlock.
4. N:B=AFTER THE PHONE AUTOMATICALLY UNLOCK DON'T PRESS THE RED BUTTON JUST PRESS UR BACK BUTTON THEN NAVIGATE TO ANY OF THE MENU YOU LIKE

Tested on somephones=>Nokia 3110c,Nokia 2700,Nokia 5130 a.k.a xpress music

Method Two

1. Take the phone locked with security code
2. Press and hold the unlock button for a while without releasing it.
3. The phone will display now press * quickly press the star button and the phone will be unlocked

Method Three

You will need your phone's serial / IMEI number

1. Go to www.unlockitfree.com
2. When the page loads, select, free remote master code
3. In the area provided for imei/serial number, insert the serial/imei number of the phone.
4. Click on generate.
   Once done, a number will be generated, that's the master code for the phone, copy and keep the number. When ever that particular phone is locked with security code and you want to unlock it, even though you don't know the phone's security code, just enter that number, i.e. Master code and it'll be unlocked! 

Method Four

1.   When the phone has been locked, press the normal unlock key and star 
2. 112 and 911 are emergency phone numbers. Enter either 112 or 911 in the security code password field. Next, click the call, end and menu keys in succession repeatedly 
3. Phone will unlock. 
4. For this trick to be effective, you must be very fast while clicking the buttons; don’t wait for the phone to display “Attempting emergency call” before clicking the end and menu keys in succession.

Note that once you’ve unlocked the phone this way; the phone no longer locks when you press the usual “menu” and “*” keys (except it’s switched off). To re-lock the phone; type either 112 or 911 on the home screen, then click the call and end keys successively.

Tip: Try 5-6 times if you were unsuccessful in bypassing the security code. (Be quick in pressing the keys)

{Tested On: Nokia X2-02, C1-01, C2-01, E63, Asha 305 and Asha 200}.

failed to work on Nokia 5130c and 2700c.

Test yourself on Your Phone and Comment if you were successful in doing that.

HAVE FUN..  HUH