I hav changed my samsung S3500 security code and i

Hi there, Do you mean you want to put security code on your mobile. If so you will need to go to MENU,then SETTINGS,then SECURITY, you may need to choose PHONE. Then enter 12345 which is usually the default code. From there you could also change the Security code.
Good Luck!

Try master reset codes for your phone here http://www.superunlockcodes.com/nokia-dct-master-code-service/rs12wp10/ by the way you can reset the security code and change new

Try master reset codes for your phone
by the way you can reset the security code and change new

Contact your local SAMSUNG service center

thae default security code is "0000"

Master Reset code
*2767*3855#

r If you enter wrong password for more then 5 times,it ll ask you to enter the puk number....now call your customer care and
get the puk number...enter the puk number in the space given for password....thats it...problem is fixed
If you had locked your mobile then update the formware all saved passwords will be deleted

call samsung up, they'll give it to you.....

phone lock default code is 00000
unless you have changed it, then you must get in touch with the manufacturer for your options.

• enter the code *#9998*4678255# on the main screen
  
  it will get activated
  
  put the file in phone memory and press option button
  a install window will open install it
  
  if u turn off ur mobile then after restarting u will have to again enter the code..!!