With the popularity of smart phones, this SIM card is also more and more in the course will inevitably encounter a series of problems, which this SIM card is locked so that the user is a very troublesome problem, following on with a view look at this presentation. Some need to fight customer service consulting. Hello, this is the wrong PIN code caused SIM card locked, you need the PUK code to unlock some operators PUK code in the card deck do have.
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