What is a CarrierLock

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SIM lock:

A sim-lock, network-lock, CARRIER LOCK, imei lock or (Master) SUBSIDY lock is really a technical limitation built into GSM and CDMA cell phones by producers for use by service providers to limit using these phones to particular locations and/or networks. This is as opposed to a cell phone (retrospectively called SIM-free or unlocked) which doesn't enforce any SIM limitations.Unlocking a cellphone is virtually universally legal. Additionally, it is often legal for service providers to force SIM locks for certain time periods, varying by region.

Unlocking Technology:

A device can be unlocked by entering a code provided by the service operator. Alternative mechanisms incorporate software running on the handset or a computer attached to the phone, hardware devices that link to the device or over-the-air by the provider. Most of the time the unlock procedure is permanent. The code needed to eliminate all locks from a phone is called the master code, network code key, or multi-lock code. If the device is carrier locked it will generally display one of these messages: SIM network PIN blocked, Enter lock PIN.


The primary reason to unlock a device is to be able to use it with another type of SIM card. Users may need to keep on using their mobile phone but with a new service provider or when traveling in foreign countries they may need to connect to a international network by using a prepay subscription.

Unlocking Services:

Certain organizations offer a online smartphone unlocking service . This service calls for people that need to unlock a mobile phone to supply their IMEI number to a service supplier and in most cases they will also ask for the country and service provider the mobile phone handset is locked to, frequently sent via email or entered on their web site. The company then will supply (for a fee) an unlock code for the mobile phone.

Unlocking Service Providers:

Unfortunately there are lots of scammers on-line retailers operating in the smart-phone network unlocking industry. As a result it pays off to make sure you locate a reliable service provider for such a service. To assist with your search for a legitimate company, we have provided a list just below (and in no particular order) of a number of genuine organisations currently offering such services.

Reputable Mobile Phone IMEI Unlocking Service Providers: