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These directions are for an AT and T phone, but other than that, are the same for any carrier. A PUK (PIN Unlock Key) code is required to unlock SIM cards that have become locked following three successive incorrect PIN entries. If your SIM card becomes locked, you will need to get a PUK code from your phone carrier to unlock your SIM card. You can obtain your phone's PUK code from your carrier in one of these ways: Log in to Your account.online Use a Technical Support Chat Contact your carriers Customer Care Get Your Phone's PUK Code Online Go to the Phone/Device page. From the My Phone/Device screen, select the Unblock SIM Card link under the My Make & Model heading. The Unblock SIM screen will display your PUK code and will give you instructions for unblocking your SIM Card. Once you receive your PUK code, you will need to enter it into your phone to set a new PIN code. Note: If you enter the wrong PUK code 10 times in a row, your SIM card will be invalidated, and you will need to purchase a new SIM Card. The phone will display the following error: "PUK blocked call operator
stands for 'Pin Unlock Code', and has to be entered if you've locked
your SIM by repeatedly entering the wrong PIN code. If you're asked for
a PUK code, you've had more goes at guessing your SIM card PIN code
than you're allowed. You'll need to phone your network provider
Customer Services for your PUK code to unlock the SIM. For security
reasons, it's only the network operator that can legally provide you
with a PUK code to unlock your SIM.With some phones you will get a cert card with your sim card and it might have the 8 digit PUK on it. if this has been entered 10 times or more incorrectly then you will need a new sim card
PUK stands for Personal Unblocking Key, and it is a unique
identificative code to prevent theft, or unauthorized users from using
your SIM. Even if it comes with the phone, PUK code is associated to SIM card, not to the phone.
When you input wrong SIM card pin three times , the phone will ask the PUK code.
Usually PUK is printed on a sticker inside phone box.
If you have lost your PUK code you will need to call the company that
provides you the phone service when you bought the phone (eg.
Vodaphone, Orange, 3, Telecom etc.).
The only alternative is going to a phone shop, they will call the phone company , get PUK and unlock your SIM.
Some phones have also an unlock code, but this is not called PUK, if phone asks for PUK you need to call phone company. There is no way to get PUK straight from the phone. If phone is locked with Phone Lock Code go to a local phone shop, they will connect it to a computer and get the code.