Unlocked Cell Phones - What Does it Mean?

Everyone's talking about unlocked cell phones, but no one is taking the time to explain exactly what it means. Here are a few basic points about the subject: In general, there are two main types of cell phones, GSM and CDMA, each compatible to different frequency ranges. When GSM compatible phones come out of the factory, they can be used under any GSM carrier (ATT, T-Mobile etc.) around the world using 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. They then offer cheap phones in return for a long term commitment to a service plan. Unlocking mobile phones sometimes enables the customer to reverse the lock settings and to use their device with other GSM carriers. Another way is to buy the phone in its original state, already unlocked.

Can you use cell phone unlock codes that you can find over the internet?

Unlock codes found over the internet could either be worthless or harmful to your device as propriety setting may still remain on the phone, so it's usually best to simply leave it to professionals.

And what about CDMA phones?

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 may still be possible in the future.

Source: https://file-downloaders.com/unlocker/