Everyone's talking about unlocked cell phones, but no one is taking the time to explain exactly what it means. Below are a few basic points regarding the subject:

Generally, the two main main forms of mobile phones, GSM and CDMA, each compatible to various frequency ranges. When GSM compatible phones come out of the factory, they are often used under any GSM carrier (AT&T, T-Mobile etc.) worldwide employing a SIM card.

However, mobile carriers usually choose to lock these settings, so that they don't work with other carriers and customers can't simply change carriers at will. Then they offer cheap phones in exchange for a long term dedication to services plan. Unlocking mobile phone devices sometimes enables the client to turn back lock settings and also to use their device along with other GSM carriers. Yet another way is to purchase the phone in the original state, already unlocked.

Can you use cell phone unlock codes that you could find on the internet?

Unlock codes found over the web could be either worthless or harmful to your device as propriety setting can still remain on the telephone, so it's usually advisable to simply let it rest to professionals.

As CDMA phones don't use SIM cards, at present unlocked CDMA cell-phones is only a concept and they are pretty much programmed to work only under their assigned carrier. But as technology keeps changing, it could be possible in the future. For more information please visit http://www.expressunlockcodes.com