The first step is to switch on the phone- and at that time, it should not have any SIM card inside it. Then you need to key in the code *#0000*CODE# along with the unlock code that you have. After that, you need to again key in *#0001*CODE# along with the unlock code. After this, the phone will get unlocked.
Tap "Set up SIM card lock." Tap "Lock SIM card; Enter your SIM card PIN (Note: The default PIN is 1234) Samsung Galaxy Network Unlock Codes. If you see the "Enter Network Lock Control Key" or "SIM Network Unlock PIN" on the screen. If the message "Unsuccessful" appears, you have tried to enter the unlock code several times. In this case, enter:
If you need to get your 9mobile PUK to unlock your SIM, simply dial the following 9mobile Customer Care lines below: Dial 300 or dial the previous number - 200, if you are calling directly from a 9mobile number. Dial 08090000200, if you are calling from another network within Nigeria. Dial +2348090000200, if you are calling from outside Nigeria.

To unblock your SIM card right away, log into your Fizz account to reveal your PUK code (My Plans > Manage > Unblock SIM card).Type the code that is revealed into your phone. If you entered 3 incorrect PIN codes and your phone displays "SIM card blocked" or "Enter PUK code", your SIM card has been blocked to ensure your security.

Step 3. After you prove ownership, your request for an SIM network unlock PIN will be submitted. Receiving the PIN may take as long as a week. Step 4. When you have received the PIN, turn off the phone and remove your old SIM card. Step 5. Insert the SIM card from your new carrier and turn the phone back on. Step 6.

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universal puk code for sim card