If you have just learned that your GSM mobile phone is locked, you might be wondering what on earth that means and possibly asking yourself how you can “unlock” it. The short answer is that some wireless providers do lock their phones, meaning that they can only work with memory cards, or SIMs, issued by them.

You may well find that your GSM mobile phone is locked and in this case you will have several questions. Is it legal for me to unlock my phone? Will my existing provider know if I unlock my phone? Is it possible for my existing service provider to relock my phone without telling me?

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