what is a unlocked cell phone
An unlocked cell phone is a phone that works with any carrier.
Most cell phones use a Subscriber Identification Module – or SIM – that stores the user’s data (phone number, etc.), and will ONLY work with that carrier’s phone. You’ve seen these little things a million times – they’re about the size of a fingernail, and they resemble tiny little circuit boards. When you buy a phone and service from a carrier, they’ll do all sorts of things to the card – then pop the back off the phone, plug the SIM in and away you go. But make sure you LOVE your phone and carrier – because the SIM won’t work on another carrier’s network.
In other words, if you purchase an ATT contract, your SIM won’t work in another phone supported by a different carrier (Verizon, T-Mobile, etc.). Therefore, your information or phone is “locked” – the SIM works with only one carrier. (This is one way cell phone companies force you to stick with them, and also how they recoup losses on “free” phones.)
An unlocked phone is a phone that, either through software or hardware modifications, will work with ANY SIM, regardless of carrier. So, if you purchase an unlocked iPhone, you can (most likely) move the SIM from your Verizon phone to your iPhone, bringing your phone number, etc. with you. But remember: although an unlocked phone allows you to move from one carrier to the next, some features exclusive to the carrier may not “come across” to the new carrier/phone.
Hi unlocked cell phone are nothing buut phone free to all network sim in all countries.Locked phone will work only with the particular network to which it is locked.There are many ways found to unlock mobile they are by using cable ,software,code etc.. among the code is the best .To get code visit OnlineGSMUnlock.com here they ask you the mobile model ,country and the network name to which your mobile is locked and the IMEI number of your mobile .Then they deliver you code to unlock your mobile.
When you buy a phone from Tmobile or att for example they set their phones so only tmobile sim cards or only att sim cards work in them. The only time you should buy an unlocked phone is lets say you want the lg shine that is exclusively on att but you have tmobile. You can unlock the phone so a tmobile sim card will work in it even though it is an att phone. I would recommend against doing that unless you want a phone from another company because most companies are willing to unlock your phone after a while.
