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What are unlocked cell phones? What are the advantages and disadvantages of an unlocked phone? If these questions have brought you to this article, they will surely be answered. You need to know about what are locked and unlocked phones, if you are planning to change your cell phone service provider in the near future. Remember that unlocking a cell phone and jail breaking it are two different things. You should not get confused between the two. In the following lines, I define what does unlocked cell phones and unlocked iphone 4 mean.

What Are Unlocked Cell Phones

To know what does an unlocked cell phone mean, you must, of course, know what are locked phones. I am sure that you are aware of SIM (subscriber identification module) cards that need to be inserted in cell phones to be able to use any service. When you opt for a subscription plan from a cell phone company, that provides you a cell phone as part of the deal, it is internally programmed to be operated only with that particular cell phone service.

That is, the phone works only if you insert a SIM card of that particular cell phone company. If you insert any other card, you won't be able to connect with their service. Such cell phones are called locked cell phones. Now, that you know what are unlocked phones, what are unlocked cell phones is easy to guess. An unlocked cell phone is one whose internal settings have been changed so that it is no longer tethered to a single cell phone service.

How Do You Know Whether a Phone is Locked

Now that you know what does unlocked cell phone mean, let us know how to recognize a locked cell phone. The only way to know if your cell phone is locked is to insert a SIM card of another cell phone service and see if it works. If it does, then your phone is already unlocked or rather never was locked. On the other hand, if the cell phone done not work with any other carrier, then it is indeed locked.

How to Unlock a Cell Phone

The best way to unlock your cell phone is through the mobile phone company itself. They may charge a fee to get your phone unlocked after your contract with them has expired. You always have the option of going to third party services who can do the job for you, for a small fee.

Hope this article has left no doubts in your mind about what does unlocked cell phones,unlocked phones and unlocked iphone 4 mean. If you want to buy cheap unlocked cell phones,please visit TradeTang,all cell phones sold at discount prices.