What is phone unlocking?

Carriers, providers and networks lock phones so customers have to use their network at their rates. This means that you cannot use other SIM cards in your phone and thus cannot change over to better providers who have cheaper rates. An unlocked phone is also subject to roaming charges making calls and SMS messages abroad very expensive. By unlocking your phone you are free of all restrictions. You can choose which network carrier you want to go with without having restrictions placed on your phone.