Lock your SIM card with a PIN (personal identification number) so that an identification code is required for phone calls and cellular data usage. To stop other people from using your SIM card to make phone calls or use cellular data, you can use a SIM PIN.
What is a SIM PIN? A SIM PIN is a 4-digit code that stops people from using your SIM card when it's switched off or taken out of your phone. If you set up a SIM PIN, you'll be asked to enter the PIN when you turn on or restart your phone.
By default, your SIM PIN is the last four digits of your PUK. You can change your SIM PIN through your device settings. So, if you've forgotten your SIM PIN, enter a random 4-digit number, like 0000, until you're asked for your PUK code.
The default pin is 0000. For help to change it, see the 'basic function' menu in our device guides. If your SIM PIN is entered 3 times incorrectly your device will ask you to enter your PUK (Personal Unlocking Key).
1. Default SIM Pin code of Sprint and T-Mobile is 1234. 2. Default SIM Pin code of AT&T and Verizon is 1111.
3 replies. Get on live chat and ask them for a PUK code before trying a third time. If you get it wrong and the SIM is blocked you have ten chances to enter the correct PUK for your SIM and you can then set a pin of your choosing. FYI - The default pin is either 0000 or 1234.
The PUK (Personal Unblocking Key) code is a code consisting of 8 digits. It is used to unblock your SIM card when you entered 3 times a wrong PIN code. A card blocked by the PUK code cannot be unblocked; it cannot be used any further and you have to replace it.
Unfortunately, there is no option for you to manually unlock your phone if forgot your PUK Code. The only option left is to call the customer support of your internet service provider to request unlocking your SIM Card.
What is my SIM card PIN? The PIN code for your Three SIM card is printed on the delivery slip that comes with your SIM card. Note that you get three tries to enter the PIN, and your phone will be locked if you fail after these tries. If your phone gets locked, you'll then need to contact 3 to get a PUK code.
Usually, you'll have to enter the phone number or SIM card number. After that, you may get a message with further instructions. And some SIM's take up to 24 hours to activate, though this is rare. Typically, to activate your SIM card you just need to insert the correct sized SIM into your phone.
Many network service providers offer Port Freeze or Number Lock to protect your mobile number from unauthorized transfer. Once activated, you can't port your number to another line or carrier unless you remove the lock, either with a PIN or by walking into the store.
The SIM card on your mobile phone will become locked if you enter an incorrect personal identification number (PIN) three times. You won't be able to use your phone, except for emergency calls. To unlock it you must reset your PIN by entering your SIM card's unique unlock key (also called a PIN unblocking key or PUK).
The PUK (Personal Unblocking Key) code is usually an eight-digit unique number assigned to a SIM card and is available as a security feature for all SIM cards. Most mobile phones have a PIN (personal identification number) designed to prevent unauthorized usage of your phone and keep SIM details safe.
When you buy your SIM card, it's attached to a larger piece of plastic that you pop it out of. Your actual SIM also has a series of numbers printed on it. Your PUK code is the 8 digit number found on either the SIM or the additional SIM packaging.
Call your network provider.
The PUK code is unique to your SIM card, so you can only get this from your mobile network. Sometimes the network will give you this when you first get the SIM card, but not all networks do this.
The Network Unlock Code (NUC), sometimes called a Network Unlock PIN (NUP) or Network Control Key (NCK), allows you to unlock a mobile phone from its original network. If you've not received a NUC you can request one.
If unavailable, ensure a SIM card is properly inserted. The default SIM PIN is 1111.
Lock your SIM card with a PIN (personal identification number) so that an identification code is required for phone calls and cellular data usage. To stop other people from using your SIM card to make phone calls or use cellular data, you can use a SIM PIN.
In many cases, SIM numbers are changed directly by telecom company employees bribed by criminals. Once this happens, the victim's phone will lose connection to the network, and the fraudster will receive all the SMS and voice calls intended for the victim.
To protect your SIM card from others using it for phone calls or cellular data, you can use a SIM PIN. Then, every time you restart your device or remove the SIM card, your SIM card will automatically lock and you'll see "Locked SIM" in the status bar. Don't try to guess your SIM PIN.