There are two ways you can get your lost PUK code. The first method is to visit your sim provider's nearest service center and ask the staff to retrieve your PUK code for you. After verifying that you're the real owner of the sim card, they will get you your O2 sim PUK code in no time. The second way is to utilize O2's official website to Most PUK codes are always included in your SIM card's packaging. If you look closely, you will find the PUK code either printed on the card or in the documents that come with the card. 1.2.2 Retrieving the PUK Code from Straight Talk Account. Most carriers offer online accounts for their clients these days. Support Devices PUK code unlock If a SIM PIN security code has been entered incorrectly multiple times, the SIM will lock and require you to enter a PUK code to use your device again. Be careful! If you incorrectly enter your PUK code 10 times, your SIM will need to be replaced. We can provide your PUK code. This happens when you lock your SIM card. Send us a private message to @CricketSupport and include the name and address on your account, your wireless number, the IMEI number of your device, and your SIM card number. Like; Quote; Reply. Powered by Gainsight. Terms & Conditions Cookie settings. To retrieve your MTN PUK number if you're locked out of your SIM card using a USSD Code, follow these steps: Step 1: Dial *123*7# on another MTN line (third-party phone). Step 2: Choose option '3' to get your PUK code. Step 3: Follow the prompts and answer the security questions to confirm ownership of the line. 1. Check the full-size SIM card you received This is the easiest and fastest way to locate your PUK. Regardless if it's a prepaid SIM card or a postpaid SIM card, they are identical in shape and SIM card size - that of a full-size SIM card or mini-SIM card. First of all, the easiest way to obtain your PUK Code is by checking the SIM card package. This is a standard requirement that all carriers must provide to their customers. For reference, the PIN code is a 4-digit code compared to the 8-digit PUK code found below your PIN code. Enable SIM Lock. Open the Settings app on your phone. Scroll down until you find "Security.". Find and tap on "Advanced settings" (all the way at the bottom). Tap on "SIM card lock.". Select your SIM card (if you have a dual-card device). Toggle the "Lock SIM card" option on. Input your default SIM PIN and click "OK.". If you have locked your SIM card, you can unlock your SIM with the help of a Personal Unlocking Key (PUK code). The PUK code is generated by giffgaff and you can request Your PUK Code HERE. Once you have obtained your PUK, please type it on your phone to unlock your SIM card. giffgaff help article: I blocked my SIM, what can I do? Thanks. The PIN and PUK codes can be found on the SIM card packet that is provided to you when the sim was purchased. There is a PUK 1 and PUK 2 code to help with securing your SIM pin. You can use it to unlock a blocked SIM pin. If you're not in possession of your SIM packet (SIM card holder), please speak with an agent; click the floating Live Chat 3YAnA.