Overview of Unlocked Cell Phone

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Any mobile phone is using a Subscriber Identification Module (SIM) card. This is used to store data from the mobile phone such as text messages, images and even videos. The mobile phone will be useless without a SIM card because it is like the heart of the phone where major functions and operations happen. But with every mobile phone there is a designated carrier that is why when you buy a mobile phone a SIM card from a specific carrier is provided to you. When you use a SIM card from another carrier it will not work this is what they call a ?locked phone?. But if you have an unlocked cell phone you can use any SIM c...
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