Is your phone PUK locked?
What is a PUK1 code and where do I find it?
PUK stands for PIN unlock Key. The PUK1 code is a number used by Skinny for activation of SIM cards and site registration, especially for data-only devices.
The PUK1 is also required to unlock SIM cards that have become locked following successive incorrect PIN entries (if you have set-up a PIN lock on your phone).
Your PUK1 code is on the back of the plastic card that came with your SIM. If you've lost that, give us a call on 0800 475 4669 to get your PUK code.
Note: If you enter your PUK1 number incorrectly 10 times in a row, your SIM will be permanently locked and you'll need to buy a new SIM here.