These are coded phones that will only work with a certain cell phone service provider. These can be used overseas with other service providers but there is a hefty fee for that in most cases. The phones are just like any other phone but they can only be used with one service provider.
The prices are sometimes a third of what the phone is selling for in the market but there is a requirement of generally a two-year contract with the company. Violation of the contract results in severe penalties.
They often carry several logos of the service provider on the front and the back.
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The phones from which coding has been removed and can be used with any service provider are known as unlocked phones. The only difference between them and normal phones is that they were once locked and were unlocked. These can be used with all service providers.
They are available online most often and one can get a good deal on them. Mostly these are used though there are some that are brand new as well. They do carry the logos of the service provider who originally offered them to the buyer.
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