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    Apple iPhone 7

    Troubleshooting

    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.