If you enter the wrong SIM PIN too many times, your wireless carrier may be able to give you a Personal Unlocking Key (PUK).
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.
Where to enter the PUK code on an iPhone? Right after you enter the wrong PIN code for your SIM card for the third time, your iPhone shows the PUK screen. If you know the PUK code, you can type it right now.
If you fail to enter the SIM PIN you need to get a PIN Unlock Key (PUK) from your cellular carrier. You can usually get this by logging in to the carrier's website, or just call the carrier and ask. The alternative is to get a new SIM card and NOT enable the SIM PIN.
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.
A PUK is required when you want to unlock a phone. You'll need one in the event that your handset is locked by your current network and you want to use a SIM card from another network. You'll also need to get a PUK code in the event that you mistakenly enter the wrong PIN code and you are automatically locked out.
Your SIM PIN is different to your PUK and your phone passcode. It's a 4-digit number that lets you lock your SIM card to one device. By default, your SIM PIN is the last four digits of your PUK. You can change your SIM PIN through your device settings.
If your SIM card is permanently blocked as a result of entering the wrong PUK repeatedly ten times, the only way out is to contact your service provider. Perhaps, they'll need to help you retrieve your line (by linking your phone number to a new SIM card).
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.
Sim locked simply means the sim has a sim pin, which has nothing to do with the iPhone. Enter the PIN number for the sim, or get a new sim that is not locked. If you look in Settings->General->About->Carrier Lock it should say "No sim restrictions".
The PIN is an acronym for Personal Identification Number and represents an access code made of four digits. When you buy a SIM card, you also receive a PIN for it. You need this four-digit code to enable the SIM card once you have inserted it into your phone, to be able to access your operator's mobile network.
Each operator has a default passcode, usually 1111, 0000, or 1234.
(upper-right). The default SIM PIN is 1111.
Only your carrier can unlock your iPhone. Contact them and request an unlock. After you submit the request, it might take a few days to complete. Contact your carrier to check the status of your request.
You can remove the SIM lock by performing an unlock procedure on the phone. Although the specific unlock instructions differ according to your phone model, the procedure consists of obtaining an unlock code from your existing mobile provider. You can also buy a code online if the provider is unable to give it to you.
If your SIM card is protected by a PIN code and this code has been entered incorrectly multiple times, the SIM card will be blocked. You will require a PUK code to unlock the SIM card again.
You can try online to find your PUK code as long as you have an online account through your network provider (most offer this service). Log in to your mobile phone account on your computer and look for a PUK code section on your account page. Where this appears will vary among network providers.
SIM Network Unlock Pin (NUP) is a code used to unlock an Android phone or iPhone from its original carrier so that it may be used on other carriers. This code is typically 8 or 16 digits long and is used to unlock a smartphone.
What are PIN and PUK codes? The PIN code is a code that gives access to the secret keys on the card. You can change this code in the eID Viewer. The PUK code is a code that you must use when you have lost or forgotten your PIN code.
Inputting your PUK code
1. Before attempting to input your PUK code, ensure that you have the correct code provided by your Network provider. 2 . After ten unsuccessful attempts to input your PUK code, the SIM card will be permanently disabled.
PUK can be due to vasculitides and collagen vascular disease; rheumatoid arthritis (RA), granulomatosis with polyangiitis (GPA), and systemic lupus erythematosus (SLE) can account for up to 53% of PUK cases.