All mobile phones that come from mobile service providers are “locked” unless otherwise advertised. The term “locked” means the phones are programmed to only work with a particular mobile service company. If the user tries to insert a SIM card from a different company, an error message appears and the phone will not make or receive calls. Most standard phones, advanced SmartPhones such as the iPhone are not included, use a simple process of entering a specific code to unlock the mobile. This code may be obtained from the service provider or through a company that specializes in mobile codes. Writer Bio
