If your device isn't working properly, you can try several solutions to solve the problem.
In most cases you can solve the problem by following these guidelines:

If you enter an incorrect PIN three times in a row, you need to key in your PUK.

Solution: Key in the correct PUK.
Please note: if you haven't received a PUK or don't know it, it can be obtained by logging on to Swisscom Customer Centre.