I've forgotten my security code...so hard to me change new sim..

The default Nokia security code is 12345 unless it was changed.

try the default codes like 12345 or 00000. if they didn't work our you can go with resetting your phone. You can reset your security code through master reset codes. You can get the master reset codes from Unlocking4Free.com.

go to service menu: 1809*#900#
and pres Factory reset
it will delete everything from phone and default security code will be 0000

Solved. start ur phone with out sim card and then do a emergency call. when start call u can put this code *2767*3855# and ur phone will restart and never will su code it will hard reset ... enjoy

ur defalt phones codes is 12345 or 00000 u can use it
Default 4 Digit user code: 1234 or 0000
Default 6 Digit Security code: 123456 or 000000
Default 6 Digit Security code: 000999 or 1122
Type *#06# at the mobile screen to know IMEI no of your mobile.
send the IMEI no to me and i will reply you with unlocking code.
IF Problem not Solved So
Please New Software install in the Phone Problem will Solved
OR:
If For puk & pin cod problem So Please
Very Best Solution:You Go To Service & Sim Office and Get The Puk code And Pin code From Office oprator
Enter The Puk code and Yes
Enter The pin code and Yes
So Puk code Open and Problem will Quickly Solved

Hi

In case you've forgotten your Nokia cell phone's security code, you can crack it here for free. I've checked the site, it's safe and works - all you'll need is the IMEI number inside the battery cover.

Regards

Seems that the phone is not blocked (Not reported stolen)
So your security master code is 6253524725

are you going to change your lock or security code?if you wish to changer it,or are you trying to put a security on your phone.(* the default code is 12345)

just go to settings > security > lock code and enter your code (there's an option if you wish to change or edit your code.

good luck...

There's good news and bad news. The good news is that you might well have forgotten that the default password on the Samsung SGH-D500 phone is 00000000 (that's eight zeroes). The bad news is that if you've changed it to something else and that's what you've forgotten, you might well need to take the phone in to a service center to have them help you break it back open.

First, here's what Samsung says about working with passwords on the D500:
Security

Use this menu to protect the phone against unauthorized use by managing the several access codes of your phone and SIM card.

Note: If you enter an incorrect PIN/PIN 2 three times in succession, the SIM card is blocked. To unblock it you need to enter your PUK/PUK2 (Personal Unblocking Key). The codes are supplied by your network operator.

PIN check

The 4-to-8-digit PIN (personal identification number) protects your SIM card against unauthorised use. When this feature is enabled, the phone requires your PIN each time it is switched on.

Change PIN

Use this menu to change your PIN. The PIN Check feature must be enabled to use this feature.

Phone Lock

The Phone Lock feature locks the phone from unauthorised use.

When this feature is enabled, you must enter a 4- to 8-digit phone password each time the phone is switched on.

The password is preset to 00000000. To change the password, use the Change Password menu.

Change Password

Use this menu to change your phone password. The password is preset to 00000000.

Privacy

Use this menu to lock your media contents, including MMS messages, emails, images, videos, music files and sounds:
1. Press [OK/i] to check the item(s) to lock.
2. Press Save to lock the marked items.
3. Enter the phone password and press OK.
To access a locked item, you need to enter the phone password.


If that doesn't help you, as I said, you'll need to take your phone to the local service center and ask them for help. Just a tip: bring some sort of proof of purchase or ownership so they can differentiate between you losing your password and someone else showing up with a stolen telephone.

Try to refrain from posting personal information like an IMEI number on a public website - for future reference.
A security code is a code put there by you to lock your phone from anyone using it. If you've forgotten it, You'll need to do a master reset on your device, losing all of your data in the process. You do not need to announce your IMEI for this purpose. A master reset can be performed by entering *#7370# or *#7780# into your phone.

An UNLOCK code for your SIM card is used to unlock your phone to other carriers SIM card. You do need to provide an IMEI for this purpose HOWEVER, unlock codes are not free and you may purchase one from here: http://www.unlockitnow.com