Will a defreeze or unfreeze code unblock my handset?
If you enter an incorrect unlock code into your Samsung handset too many times you may end up with a PUK request. The PUK or Personal Unblocking Key is a reset code that allows you to enter your SIM network unlock PIN.
The screen will show something similar to above and say something like:
‘SIM network PIN blocked. Enter SIM network PUK.’
You can bypass this screen on Samsung handsets by using a DEFREEZE or UNFREEZE code. This supplemental code will unblock your handset and allow you to enter the correct unlock code.
If you have a handset other than Samsung you will need to request your PUK from your network.