Samsung Instructions

Congratulations on getting your Samsung Phone Unlocked.
Please see the complimentary instructions on how to enter your Unlock Code into your phone. Here are some acronyms to help you:
NCK = Network Control Key
MCK = Master Code Key (also known as Defreeze code)


Got Your Unlock Code? Let’s Get Started!

After receiving your unlock code from us, you are now just one step away from unlocking your phone.

But before you proceed to enter the unlock code, do the following:

  1. Disable / turn off your Airplane / Flight Mode.
  2. Turn off WiFi.

There are several ways to enter an unlock code for a Samsung mobile. The most common ways are:

Method #1

  1. Insert a non-supported sim and switch on the phone.
  2. You will be prompted to enter the unlock code, with a message similar to “SIM Network Unlock PIN” or “Enter Network Lock Control Key” displayed.
  3. Enter the unlock code.

Depending on various circumstances, your phone may not prompt you for the unlock code immediately after you switch on the phone. If you have confirmed that your phone is locked and it does not prompt you for the unlock code, then you will have to try out each of the following methods and see which one works for you:

Method #2

  1. Insert a non-supported sim and switch on the phone.
  2. Enter the dial screen.
  3. Dial  #7465625*638*YourUnlockCode#.
  4. Your phone should now be unlocked.

Method #3

  1. Insert a non-supported sim and switch on the phone.
  2. Enter the dial screen.
  3. Dial #0111*YourUnlockCode#.
  4. Your phone should now be unlocked.

Method #4

  1. Insert a non-supported sim and switch on the phone.
  2. Enter the dial screen.
  3. Dial #7465625*638*#.
  4. You will be prompted to enter the unlock code.
  5. Enter the unlock code.
  6. Your phone should now be unlocked.

If your phone displays any of the messages below:

  • Code Accepted
  • Network Unlock Successful
  • Not Yet Personalized

Congratulation, your phone is now fully unlocked!

BUT What If…

…things just don’t go as planned? There is a possibility that the code that you received may not work first time, and it will display ‘Network Unlock Request Unsuccessful’ instead.

Don’t panic yet, follow the troubleshooting guide below



Troubleshooting Guide

NCK = Network Control Key

MCK = Master Code Key (also known as Defreeze code)

Here are some Troubleshooting Methods

While we try to include and compile as many alternative methods gathered from different users as possible, they may or may not work for you, but it is still worth a try.

Disclaimer: Most of these methods are based on user experience from various sites and forums.

Method #1

Factory reset the phone. You can perform either a soft or a hard reset and try the code once you have completed the process.

Warning: This action will revert your phone back to its original state and everything – data, photos, videos, contacts, apps etc. – will be wiped clean. 

Soft reset:

  1. Go to Settings > Personalisation > Back up and reset > Factory data reset. You can also do so by entering the dial screen and enter *2767*3855#.
  2. Reset device.

Hard reset:

  1. Turn off the phone.
  2. Once it is off, hold ‘Volume Up’, ‘Home’, and ‘Power’ button simultaneously, until it boots with the Android robot appearing.
  3. When you have access to the menu, use the Volume up / down buttons to navigate, and the Power button to select.
  4. Select Wipe Data/Factory Reset, and Yes, delete all user data.
  5. Wait for it to process, and reboot the phone once again.

Method #2

This method works normally on Samsung mobile phones using Android version 4.4.2, most commonly run by models such as Samsung Note 2 and Samsung Galaxy S3. You are welcome to try it out too even if your phone does not run on this version.

  1. Insert a non-supported sim and switch on the phone.
  2. Make sure that your phone is prompting for the network unlock code.
  3. Enter the dial screen and dial *#197328640#.
  4. When you see the ‘ServiceMode’ menu, press and select [1] UMTS > [1] Debug Screen > [8] Phone Control > [6] Network Lock.
  5. Press and select [1] Perso Sha256 INFO and the screen will change slightly.
  6. Press and select the MENU button and when the menu pops up, then select BACK to return to the previous screen.
  7. Press and select [2] Perso Sha256 ON and the screen will change again to a one-line message.
  8. Reboot the phone on the screen by holding the power button and select ‘Restart’.
  9. Once it is rebooted, enter the unlock code when you are prompted so.

Method #3

This method is most commonly cited to be working on Samsung Galaxy S4. It is pretty much the same as Method #2, but slightly different, because you won’t be able to enter the menu straight by dialing *#197328640#.

  1. Insert a non-supported sim and switch on the phone.
  2. Make sure that your phone is prompting for the network unlock code.
  3. Enter the dial screen and dial *#0011#. It will take you to the information section of the ‘ServiceMode’.
    If the next screen shows ‘Service: Limited’ or ‘No Service’, then you won’t be able to unlock your phone using this method.
  4. Press the Menu button of your phone on the bottom left corner, and a menu will pop up on the screen.
  5. Press Back on the menu that pops up (basically nothing will happen so you are not expecting anything).
  6. Press the Menu button again, and press Key Input this time.
  7. Enter 1 in the box when it appears, and press OK.
  8. The ‘ServiceMode’ menu will appear shortly.
  9. When you see the ‘ServiceMode’ menu, press and select [1] Debug Screen > [6] Phone Control > [6] Network Lock.
  10. Press and select [1] Perso Sha256 INFO and the screen will change slightly.
  11. Press and select the MENU button and when the menu pops up, then select BACK to return to the previous screen.
  12. Press and select [2] Perso Sha256 ON and the screen will change again to a one-line message.
    12.1. If you see a two-line message with a ‘NOT_CHANGE’ and a ‘1’ instead,
    12.2. Press Menu button and press Back on the menu that pops up.
    12.3. Select [3] Perso SHA256 OFF.
    12.4. You will see two lines. Press the first line and the message ‘MENU NOT EXIST’ will show up.
    12.5. Press Menu button and press Back on the menu that pops up.
    12.6. Press [1] Perso SHA256 INFO and make sure that it says ‘ENABLED_FLAG [0]’.
    12.7. Press Menu button and press Back on the menu that pops up.
    12.8. Press [2] PERSO SHA256 ON and make sure that it still says ‘ENABLED_FLAG [0]’.
    12.9. On the screen that says ‘ENABLED_FLAG [0]’, proceed to Step 13.
  13. Reboot the phone on the screen by holding the power button and select ‘Restart’.
  14. Once it is rebooted, enter the unlock code when you are prompted so.

Method #4

This method seems to be working more on Android version 4.1.1. Having said that, you can give it a shot too if you still are unable to get it unlocked thus far, regardless of your firmware version.

  1. Insert a non-supported sim and switch on the phone.
  2. Make sure that your phone is prompting for the network unlock code.
  3. Enter the dial screen and dial *#197328640#.
  4. When you see the ‘ServiceMode’ menu, press and select [1] UMTS > [1] Debug Screen > [8] Phone Control > [6] Network Lock
  5. Press and select [3]Perso SHA256 OFF and wait for about 30 seconds.
  6. Press and select the MENU button and when the menu pops up, then select BACK to return to the previous screen.
  7. Press and select [4] NW Lock NV Data INITIALLIZ and wait for 1 minute.
  8. Restart the phone on the screen by holding the power button and select ‘Restart’.
  9. Once it is rebooted, your phone should now be unlocked.

Method #5

  1. Switch on the phone without any sim inserted.
  2. Enter the dial screen and dial #7465625*638*#.
  3. When you see Network Lock menu, select the ‘MCC/MNC’ field and enter the respective code of the service provider the phone is originally locked to. You can search for it from the list of mobile country code. For example, if your phone is locked to T-Mobile USA, then enter 310260. It is recommended that you try the MCC/MNC code one by one, if the service provider has multiple country codes.
  4. Select ‘Control Key’ and enter the unlock code that you received and press OK.
  5. You should receive the message ‘Lock Successful’.
  6. Reboot your phone with a non-supported sim and it should be unlocked.

What If None of These Methods Work?

If any of these solutions work for you, that’s great! But what if they don’t?

There is a good chance that your phone is hardlocked (or frozen) due to excessive number of failed attempts in unlocking the phone.

Again, fret not! Some of the unlock code providers do provide the unfreeze code (MCK) along with the network unlock code to help resolve this issue. If you have this MCK code with you, see on to our guide for hard-locked mobile phones below:



Freeze & Hard-locked: Troubleshooting guide

NCK = Network Control Key
MCK = Master Code Key (also known as Defreeze code)

Everything Checked, MCK Received. Now What?
Well, you can then proceed to key in the MCK that you received. That’s what!
Here’s how.

Method #1

If you see the message below, there is probably no option for you to enter any unlock code:
Phone freeze. SIM unavailable. Contact your service provider.

  1. Insert a non-supported sim and switch on the phone.
  2. When you see the message above, enter the MCK as if there is a box (there is none actually). Nothing will show on the screen.
  3. Press “OK” or “Enter” or “Call”.
  4. The phone will now ask for the network unlock code.
  5. Enter the network unlock code (NCK) and press OK.
  6. Your phone should now be unlocked.

Method #2

If you are seeing the message,
Network Unlock Request Unsuccessful

  1. Insert a non-supported sim and switch on the phone.
  2. Enter the MCK when prompted to enter the unlock code.
  3. You will get the message above again.
  4. Enter the NCK and press OK.
  5. Your phone should now be unlocked.

The Unlock Code Still Doesn’t Work?

After entering the MCK, followed by a NCK, and the phone is still not unlocked, then it is recommended that you try out the alternative solutions.

Disclaimer: Most of these methods are based on user experience from various sites and forums.

Method #3

This is one of the most unpopular solutions, but is claimed to be working for many users. We strongly recommend this method before you try something else.

  1. If you have entered a MCK, followed by a NCK, but the phone is still displaying the “Network Unlock Request Unsuccessful” message,
  2. Keep entering NCK for at least 5 times.
  3. One of the attempts should work.
  4. Your phone should now be unlocked.

Method #4

  1. If you have entered a MCK, followed by a NCK, but the phone is still displaying the “Network Unlock Request Unsuccessful” message,
  2. Press “Dismiss”.
  3. Enter the dial screen.
  4. Dial #7465625*638*YourNCKUnlockCode#
  5. Your phone should now be unlocked.

Method #5

  1. If you have entered a MCK, followed by a NCK, but the phone is still displaying the “Network Unlock Request Unsuccessful” message,
  2. Press “Dismiss”.
  3. Enter the dial screen.
  4. Dial *2767*3855#.
    Warning: This is a factory reset. This action will revert your phone back to its original state and everything – data, photos, videos, contacts, apps etc. – will be wiped clean.
  5. Once the phone is rebooted, enter the MCK again. You will again see the “Network Unlock Request Unsuccessful” message.
  6. Enter the NCK and press OK.
  7. Your phone should now be unlocked.