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Unlocked Phones

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Basics of Unlocked Phones

{Unlocked Cell Phones 101|What is Unlocking my cell phone | Unlocked cell phones for dummies|What is a SIM Card|

A GSM phone is not directly linked to you. Instead, it has a removable card, called a SIM (subscriber information module) and this Card has a unique number on it. This is what identifies you to your carrier

Generally cell phone service works so that the unique serial number in your mobile phone (its ESN) is used by the cell phone service provider to identify who you are. The wireless carrier 'knows' that a particular mobile phone's serial number is your device and knows to send phone calls to that phone when someone dials your phone number.

The important difference about this is that you can put your SIM into any compatible phone (and pretty much all modern GSM phones are compatible with all modern SIMs) and that phone will now act as your mobile phone, because sees your sim nside the phone. They couldlnt care less that you've transferred phones, all they care about is if they can deliver service to your SIM
And now for the really glamorous part of this. In theory, you can transfer your SIM to any phone, the other way is also true. Any phone can communicate with any SIM card. So, if you've already purchased a luxurious mobile phone that you like and have leanred the features, if you change from one GSM network to a new one, you don't have to shell out money for a new phone. You can keep the phone you've grown accustmed to, and all you need to do is swap the first gsm carrier's SIM with your new service provider's SIM.

But, some wireless providers 'lock' their phones, meaning that their phones have been programmed to only work with SIM cards issued by them. Repealing that programming - unlocking your phone so it can work with any compatible network - is what this is all about.
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What is GSM Technology? Is it different than normal cell phone service? How do I know if I am on a GSM network or not?

GSM is a type of mobile phone infrastructure. The more common type of cell phone service in North America is CDMA, but just about every other country in the world uses primarily or only GSM.

For you as the consumer of your phone, there is no difference at all between using a mobile phone on a CDMA system or a cell phone on a GSM network. Unfortunately, the two different networks are not compatible with each other so you cant swap between phones if your going from GSM to CDMA or vicea versa

If you have a T-Mobile or Cingular then you are using a GSM phone.

Can I just buy an unlocked phone without signing up for service?

Yes, there are several ways to purchase an unlocked phone without needing to sign up for a year or two of contracted service that you mightn't want. You can simply buy a used GSM phone on the internet or from a friend or somewhere like that.

If you buy a used cell phone from an individual always make sure it unlocked before commiting to purchase.

You can also purchase Unlocked Cell Phones from online stores such as my favorite,J-Cellular or Best Buy

About the Author

Online store for Unlocked Cell Phones.Supplying the latest GSM cell phones !

What is the diffrence between unlocked cell phones and normal ones?

I want a new cell phone((cheap))
and on ebay all i see is unlocked phones what does that mean?
i have a tmobile phone and simply wish to take out my sim card and put it in a new phone?
is it safe to get one that is unlocked? Does it still work the same? And where can i get real cheap phones with out a new plan?

An unlocked cell phone is a phone that has been either designed or modified to work with any compatible network service. Presuming that we're only talking about GSM cell phones (the kind that take SIM cards), an unlocked phone would be capable of using a SIM card from any carrier. A locked phone would only be able to using a SIM card from the carrier it was designed for. A few phones are sold unlocked originally, but some are legal and/or illegal unlocked to be used with other networks.

It's notable that you're likely to pay extra for an unlocked cell phone. You might find luck at ebay by including "T-Mobile" in your ebay search to find used phones designed for T-Mobile.

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Tags: cellphone, gsm, mobile, phone, shopping, unlocked phones at&t, unlocked phones for sale, unlocked phones for sprint, unlocked phones for tmobile, unlocked phones for verizon

This entry was posted on Wednesday, March 25th, 2009 at 6:18 am and is filed under Phone And Sim Cards. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.